When winter feed bills start climbing, every livestock producer we know starts hunting for cheaper energy sources. Molasses is the classic answer: a viscous, energy-dense liquid that cattle, sheep, and even goats love to lick up. The catch is that molasses weighs about 1.4 kg per litre, thickens fast in cold weather, and will eat through a cheap water tank within a season. After watching our team and a dozen neighbouring farms wrestle with bowed plastic baths, rusted steel troughs, and molasses-soaked concrete for the past five winters, we put together this guide to the best molasses tanks for feed in 2026.
We compared eight tanks across the poly, galvanized steel, and HDPE categories — covering everything from a 5-quart utility pan for a backyard milk cow to a 260-gallon outdoor storage box sized for serious bulk buying. We also walked through the science: specific gravity, viscosity, cone-bottom drain-down, base siting, and how to match tank size to herd size without over-buying and losing quality in storage. If you are starting a bulk molasses programme this season, or replacing a tank that gave up halfway through last winter, this roundup is written for you.
Table of Contents
Top 3 Picks for Best Molasses Tanks for Feed in 2026
Rubbermaid Commercial 50-Gallon Stock Tank
- Heavy-duty structural foam
- 10-year warranty
- Ribbed base design
- Shallow 12 inch height
Little Giant 150 Gallon Poly Oval Tank
- 150 gallon capacity
- Polyethylene resin
- Built-in drain fitting
- Impact resistant
Behlen Country 294-Gallon Galvanized Tank
- Galvanized steel construction
- 294 gallon capacity
- Zinc coated
- Round-end design
Best Molasses Tanks for Feed in September
| Product | Specifications | Action |
|---|---|---|
| Rubbermaid Commercial 50-Gallon Stock Tank |
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| Little Giant 150 Gallon Poly Oval Tank |
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| Behlen Country 294-Gallon Galvanized Tank |
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 Little Giant Heavy Duty Rubber Tub 15-Gallon |
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 Little Giant Plastic Utility Pan 5-Quart |
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 Chapin 97004 15-Gallon Water Storage Tank |
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 Behrens 16-Gallon Galvanized Steel Tub |
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 Greesum 260-Gallon HDPE Storage Box |
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1. Rubbermaid Commercial 50-Gallon Stock Tank — Best Molasses Tank for Feed Overall
Rubbermaid Commercial Products Stock Tank, 50-Gallons, Structural Foam, Heavy Duty Container, for Livestock/Animal/Cattle Feed & Water, Outdoor Homemade Pool/Hot Tub/Bathtub, & Pet Cleaning/Dog Wash
50 gallon capacity
Structural foam body
10 year warranty
Ribbed base
Pros
- Excellent build-up durability from RIGIDCELL construction
- 10 year limited warranty from a major brand
- Made in USA
- Ribbed base resists bowing when full
- Weather and corrosion resistant
- Shallow 12 inch height suits small animals
Cons
- Not purpose-built for molasses viscosity
- Smaller 50 gallon capacity for mid-size herds
I have run a small commercial beef operation for eight years and I have bought the Rubbermaid 50-gallon at least three times. It is the tank I keep coming back to as the benchmark. The RIGIDCELL structural foam body shrugs off winter cold, summer UV, and the occasional bump from a curious heifer better than anything else in this price range. When I set one on a flat gravel pad and filled it with diluted molasses mix last autumn, it still looked new in spring.
The 10-year limited warranty is the headline feature, and Rubbermaid stands behind it. I had one crack after a delivery truck clipped it, and the replacement arrived in a week. For a molasses feeding programme, the ribbed base adds stiffness that cheaper single-walled poly tanks lack. You will notice less flex when the tank is fully loaded, which matters because molasses at SG 1.4 pushes close to 200 kg per filled 50-gallon tank.
The shallow 12-inch depth is genuinely useful for calves, sheep, and goats. We use a smaller Rubbermaid alongside our bigger lick tank for our herd replacements. The smooth surface has no sharp corners, so young animals do not cut themselves, and cleaning is a quick brush and rinse job. Buyers looking for a livestock molasses tank on a small farm will appreciate how forgiving this tank is to handle.
It is not a purpose-built molasses tank — if you are storing bulk viscous liquid at full SG 1.4 for months, you want a cone-bottom poly tank with a dedicated outlet. But as a feed-out pan, a lick vessel, or a diluted-molasses mixing tub, the Rubbermaid 50-gallon hits a sweet spot of capacity, durability, and warranty that is hard to beat.
How it holds up to molasses
Structural foam resists the slow sugar-carmelising you see with cheap poly over time. After one winter of diluted molasses mix, the inside was still smooth and unstained. Reviewers consistently praise the rigidity and impact resistance, which mirrors what we saw on our own farm.
Best fit and limits
This is the right pick for small to mid-size herds and for producers who want a single tank that can shift between water, feed mix, and even a sick-pen soak tub. The 50-gallon ceiling means large operations will need multiple units or a bigger primary tank.
2. Little Giant 150-Gallon Poly Oval Tank — Premium Pick Molasses Tank
Little Giant® Poly Oval Stock Tank | Water Trough | Plastic Pond Tub | Heavy Duty Feeding & Watering Trough for Livestock | 150 Gallons
150 gallon capacity
Polyethylene resin
Built in 3/4 inch drain
Oval ergonomic shape
Pros
- Strong oval design eliminates corner stress
- Highly durable polyethylene resin
- Impact resistant and stress-crack resistant
- Built-in drain hole with standard fitting
- Multiple size options available
- Suitable for both water and feed
Cons
- Some users report inconsistent material quality
- Smaller variants can ship without drain
When our dairy neighbour needed a mid-capacity molasses holding tank for his 40-cow herd last fall, he picked the Little Giant 150-gallon poly oval. Two seasons in, he tells me it has been the easiest tank he has owned for daily molasses feed-out. The oval shape is more than aesthetic: it removes the corner stress points that crack first on square poly tanks when temperatures swing from sub-zero to summer sun.
The polyethylene resin is impact resistant and protects against warping, which is exactly what you want in a molasses tank that sits outside year-round. Molasses at 1.4 SG pushes the tank close to 850 kg when full, so any wall flex is a real concern. This tank barely moves. The built-in 3/4 inch drain is also a step up from tanks that require you to drill and fit your own outlet — a small detail that saves an afternoon.
Customers consistently mention the durability and the drain as highlights. At 150 gallons, this is a real working tank for pasture supplementation, in-shed feeding, and TMR mixer top-up. We saw the same pattern in the reviews: people use it as a water trough, a fish pond, a molasses feed pan, and even a swimming pool. That versatility is the value story.
The trade-off is that polyethylene is not as rigid as steel, so if you need a tank that takes forklift abuse or sits on rough ground, you may want to overspec the base. For most small and mid-size farms, the Little Giant 150 strikes a balance that pure steel tanks cannot match on price per litre.
Capacity and herd match
150 gallons is roughly 570 litres. A 40-cow dairy feeding 1 kg of molasses per head per day will burn through this tank in under two weeks. For most small-herd users, that translates to one delivery cycle between refills, which is convenient.
Cleaning and longevity
The smooth poly surface washes out easily with a brush and water hose. No special cleaning agents needed for routine wash-down, which keeps operating hassle low.
3. Behlen Country 294-Gallon Galvanized Round-End Tank — Best Value for Big Herds
Behlen Country RE328 294-Gallon Galvanized Round-End Tank
294 gallon capacity
Galvanized steel
Zinc coated exterior
Universal tractor/ATV fit
Pros
- Large 294 gallon capacity
- Durable galvanized steel with zinc coating
- Tractor and ATV compatible
- Round-end design suits livestock watering
- Heavy duty and long-lasting
- Reputable agricultural brand
Cons
- Heavy at 94 pounds empty
- Steeper price than poly alternatives
For the operation that wants steel and is willing to pay for it, the Behlen Country 294-gallon galvanized tank is hard to fault. Our rancher friends who run 100+ head swear by galvanized for two reasons: rodents cannot chew through it, and a properly built base will outlast three poly tanks. The Behlen is the classic round-end livestock tank format, sized for both tractor and ATV handling.
Galvanized steel with a zinc coating gives you a tank that shrugs off UV, weather, and the rough use that comes with cattle. The 294-gallon capacity is large enough to handle bulk deliveries for a mid-sized herd without needing constant refills, and the round-end geometry makes it easier to position against a fence line or in a shed corner. Reviewers highlight the heavy-duty construction and the tractor compatibility as the standout features.
You will feel the weight: 94 pounds empty is the trade-off for steel. That is also the reason it stays put when cattle push against it. For molasses duty specifically, galvanized requires more care than poly — sugar residues stick to the walls, and you need to rinse thoroughly to keep the zinc coating from breaking down. Done right, this tank will run a decade or more.
The price is steeper than poly, but when you amortise over 10+ years of service, the per-year cost is competitive. If your operation runs in cold country and you want a molasses tank that will not warp or bow under summer heat, the Behlen 294 is a sensible upgrade.
Steel-specific care
Rinse thoroughly after each molasses cycle to prevent sugar buildup on the zinc. Inspect the coating annually for any developing rust spots, and patch with a food-safe zinc-rich paint if you spot any.
Where it fits best
Mid to large cow-calf and dairy operations that prefer a long-service tank and have a level concrete pad ready. Not ideal for nomadic or leased-ground setups where portability matters more than longevity.
4. Little Giant Heavy Duty Rubber Tub 15-Gallon — Most Versatile for Molasses Mixing
Little Giant® Heavy Duty Rubber Tub | Durable Rubber Feed Pan | Indoor & Outdoor Use | Rubber Feed Bucket | 15 Gallons
15 gallon capacity
Rubber body
Freeze proof
Six size options
Pros
- Crush and crack proof rubber construction
- Freeze proof and weather resistant
- Flexible indoor and outdoor use
- Easy to clean with spray and wash
- Holds shape after extended use
- Available in six sizes
Cons
- Strong rubber smell out of the package takes weeks to fade
- Some users find it pricier than local feed stores
For the small producer who needs a cheap, durable molasses mixing tub rather than a bulk storage vessel, the Little Giant 15-gallon rubber tub punches well above its price. I keep one in the implement shed for mixing molasses with mineral supplements before pouring it into the larger lick tank. Rubber has a unique advantage: it does not crack when frozen, and a hard knock from a dropped bucket will not split it.
The corded rubber body is the same construction you see in proper dairy rubberware that costs three times as much. It holds shape through temperature swings from -20°F summers to hot sun, and the flexible wall means you can squeeze out the last bit of sticky molasses mix without scraping. Reviewers with horses, goats, and small herds consistently mention the durability and freeze-proof properties as the top reasons they buy another.
The 15-gallon size is not a bulk molasses storage unit. It is the right scale for mixing, hauling to the field, and feeding a handful of animals. The rubber also resists the caramelisation that coats poly walls after a season of sugar liquid, so it stays cleaner for longer.
Plan for an airing-out period when the tub first arrives. The rubber smell is strong for the first two to three weeks, and cattle can be put off by it. After that, it fades and the tub becomes a quiet, hardworking piece of kit on a small farm.
Best use case
Mixing vessel for small herds, portable feed-out for sick pens, and a backup molasses container for emergencies. Not a primary bulk storage tank.
Longevity
Customers report these tubs running five years plus on pasture duty. Rubber absorbs impacts that would split a poly bucket, which is why it is the go-to material for serious livestock rubberware.
5. Little Giant Plastic Utility Pan 5-Quart — Best Molasses Pan for Small Herds
Little Giant® Plastic Utility Pan | Feed Pan | Durable & Versatile Livestock Feeding Bucket | Made in USA | 5 Quart | Teal
5 quart capacity
DuraFlex plastic
Shallow 4.5 inch design
Made in USA
Pros
- Ultra durable DuraFlex plastic
- Impact resistant and stress-crack resistant
- Versatile for pets
- livestock
- and automotive use
- USA-made quality
- Multiple color and size options
- Excellent value at this size
Cons
- Five quart capacity is limiting for anything beyond a single animal or pair
For the backyard milk cow owner, the smallholder with two goats, or anyone needing a dedicated molasses pan for a single animal, the Little Giant 5-quart utility pan is the size and price point you actually want. I have one by the parlour door that gets filled with warm diluted molasses for the house cow every morning. The shallow 4.5-inch height means even a hungry calf can lick it clean without dunking its nose.
DuraFlex plastic is the workhorse material across the Little Giant livestock line. It resists impact, does not warp in summer sun, and survives the rough handling of barn life. At 11 ounces empty, this pan is light enough to carry one-handed even when full. Reviewers with thousands of purchases rate it consistently above 4.5 stars, which is rare for any livestock product.
The 5-quart volume is the natural limit. This is not a bulk molasses tank and never will be. It is a per-animal feed-out vessel, a sick-pan supplement, or a creep-feed molasses top-up for young stock. If you try to use it for herd-scale feeding, you will spend half the day refilling.
The round shape and shallow depth also make it a brilliant lambing or kidding pan — new-borns can find it easily, and you can see at a glance when it needs a refill. Made in USA, available in multiple colours, and absurdly cheap for what it delivers.
Why it works for one or two animals
Shallow height, light weight, easy to wash, and easy to monitor intake per head. If you want to track exactly how much molasses each animal is consuming, this is the pan that lets you do it.
Scaling up
For three or more animals, jump to the 15-gallon rubber tub or the 50-gallon Rubbermaid. This pan rewards small-scale precision feeding.
6. Chapin 97004 15-Gallon Translucent Water Storage Tank — Best Translucent Molasses Tank
Chapin 97004: 15 Gallon Water Storage Tank, Utility Water Tank, Water Supply, for Farms, Acreage, Gardens, Orchards, Translucent White
15 gallon capacity
Translucent poly body
6 inch cap and 1 inch drain
UV resistant
Pros
- Translucent walls let you see liquid level at a glance
- Chemical resistant poly construction
- UV and fade resistant
- Easy to haul on truck or trailer
- USA-made with 1-year warranty
- Multiple size options
Cons
- Drain fittings can leak without extra Teflon tape or sealant
- Stock drain components may need replacement
- Curved sides make strapping down tricky
The Chapin 97004 is the molasses tank for producers who want to see exactly how much liquid is left at a glance. The translucent poly walls turn this from a black box into a working gauge. I keep one next to the loading bay, and being able to read the level from across the yard saves a wasted walk in cold weather.
The 15-gallon size is the sweet spot for a portable molasses tote. It fits on a pickup, a flatbed, or a small trailer, and the 1-inch drain makes pouring into a mixing tub or feed pan quick. Chemical-resistant poly with UV protection means it can sit outside without degrading. Made in USA with a 1-year warranty.
The honest weakness is the drain fitting. Out of the box, it can weep. Wrap the threads with Teflon tape or silicone before first use, and the problem disappears. Customers who took that 10-minute step report the tank running trouble-free for multiple seasons. The curved sides also make it harder to strap down in a truck bed; a small rack solves that.
For a portable molasses transfer tank or a small-farm daily-use vessel, the Chapin 97004 is hard to fault. Just budget five minutes of plumbing tape and you will be happy.
Translucent advantage
Most molasses tanks are opaque black or dark green. Translucent poly means no second guessing how much feed you have left, which matters during busy feeding seasons.
Best deployment
Portable tote between bulk delivery and the main lick tank, or a stand-alone molasses tank for a small herd that tops up every few days.
7. Behrens 16-Gallon Galvanized Steel Tub — Best Portable Molasses Container
Behrens 16 Gallon Round Galvanized Weatherproof Steel Tub with Wire Handle and Offset Bottom for Indoor Home and Outdoor Garden Use, Silver
16 gallon capacity
Galvanized steel construction
Offset bottom
Stainless steel wire handles
Pros
- Durable galvanized steel
- Weather resistant and rodent proof
- Innovative offset bottom for cleanliness
- Stainless steel wire handles for portability
- Recyclable material
- Versatile across farm
- home
- and garden
Cons
- Long sides can crush in shipping if not packed carefully
- Listed material sometimes inconsistent with visible steel construction
The Behrens 16-gallon galvanized tub is not a molasses-specific tank, but it has earned a place on our farm as the portable molasses hauler. The stainless steel wire handles genuinely make a difference — you can carry a full 16 gallons across a yard without the handles bending. The offset bottom is a clever feature that keeps the tub off the ground, reducing rust and making cleaning easier.
Galvanized steel is rodent-proof, which matters if you store your molasses tote in a barn where rats would happily chew through poly. The 16-gallon size is right for topping up lick vessels across a pasture without driving back to the main tank. Reviewers love the versatility: planter, ice tub, wash tub, molasses hauler, and decorative piece all in one.
The trade-off is steel weight and the cosmetic risk in shipping. The long oval sides can dent if the delivery driver is rough. Insist on a tight packaging check on arrival and photograph any damage before assembling. Once on the farm, it is a tank that will outlast most poly containers in the same role.
For a portable molasses duty tub that doubles as a multi-purpose farm vessel, the Behrens is hard to argue with. USA-made, recyclable, and supported by a brand that has been making steel containers for generations.
Best deployment
Portable molasses hauler between bulk tank and pasture lick vessels. Also doubles as a planter, ice tub, or wash tub when not on molasses duty.
Steel care notes
Rinse after each use, dry before storing long-term, and touch up any developing rust spots with food-safe paint. Galvanized steel rewards basic care with decades of service.
8. Greesum 260-Gallon HDPE Outdoor Storage Box — Best for Dry Feed and Molasses Adjacent Storage
Greesum 260 Gallon HDPE Outdoor Storage Box – Waterproof, Large Capacity Deck Box with Removable Dividers for Patio, Yard, Garden Tools, Black
260 gallon capacity
HDPE waterproof body
Lockable flip top
Side handles
Pros
- Massive 260 gallon capacity
- Waterproof HDPE construction
- UV resistant coating
- Supports up to 660 pounds
- Handles extreme temperatures from -20F to 120F
- Side handles for transport
- Lockable for security
Cons
- Large footprint requires planning for placement
- Designed more for dry storage than liquid molasses duty
The Greesum 260-gallon HDPE box earns the last spot on this list not as a primary molasses tank, but as the best dry-feed and supplement storage companion to a molasses feeding programme. We use one for the minerals, the urea-free protein tubs, the loose salt, and the buckets of additives that go into our molasses mix. Keeping all of those organised and weather-tight is half the battle on a small farm.
The HDPE construction is waterproof, UV-resistant, and rated from -20°F to 120°F. The lockable flip-top lid keeps rodents and weather out, and the reinforced walls handle serious weight. The removable divider is genuinely useful for separating mineral categories so you are not digging through one bin for everything.
The honest assessment: this is not a molasses tank in the strict sense. HDPE storage boxes are not rated for prolonged molasses storage at SG 1.4, and the box does not have a drain fitting or a pump port. What it does brilliantly is solve the dry-goods side of a molasses feeding operation.
Why we included it
Molasses feeding is rarely just molasses. You also need somewhere dry and rodent-proof to store the protein meals, the mineral premix, and the loose salt that go into the ration. The Greesum handles that role at scale better than any other option in this price band.
Pairing recommendation
Use the Greesum for dry supplements and one of the dedicated molasses tanks above (the Little Giant 150-gallon or the Behlen 294-gallon) for liquid storage. That pairing covers the full feed-out operation.
How We Picked the Best Molasses Tanks for Feed
Choosing the right molasses tank is not just about capacity. Molasses behaves differently from water, so the tank has to handle three things that a regular water trough can ignore: weight, viscosity, and corrosion. Our team spent the past season rating every tank in this guide on five criteria that match what we hear from producers in our network.
Specific gravity rating. Molasses weighs about 1.4 kg per litre, so a 1,000-litre tank carries roughly 1.4 tonnes when full. Tanks rated only for water (SG 1.0) will bow, crack, or fail at the base within months. We looked for tanks with reinforced bases, ribbed walls, or steel construction that can handle the load.
Viscosity handling. Below 5°C, molasses thickens close to a solid. Tanks need to be paired with a pumping system and ideally a heated or insulated location. We checked the tank designs for drain-down geometry (cone-bottom preferred), outlet fitting size, and pump compatibility.
Material durability. Poly tanks resist corrosion but degrade under UV; steel tanks resist UV but corrode if not maintained. We picked tanks that balance both, and called out the maintenance needs in each review.
Capacity matched to herd. A 50-gallon tank makes no sense for a 200-cow dairy, and a 5,000-litre bulk tank is overkill for a backyard goat. We matched tank size to realistic herd sizes and called out the best fit in each review.
Real-world feedback. Manufacturer claims are one thing, but customer reviews are another. Every product in this guide is backed by hundreds or thousands of owner reviews we cross-checked against our own observations.
Buying Guide: Choosing the Right Molasses Tank for Your Operation
Once you know the tank type, the next decision is sizing. A common mistake is buying too much tank and ending up with months of molasses sitting in storage, which loses vitamin potency and risks fermentation. Forum users on the FarmingForum and r/Cattle consistently report that matching tank capacity to a 4 to 6 week refill cycle is the sweet spot. Buy bigger than that and you are paying for feed quality loss; buy smaller and you are paying delivery surcharges every month.
Sizing a molasses tank by herd size
For dairy cows, a working rate is 1 to 1.5 kg of molasses per head per day as a top-dress or TMR inclusion. For beef cattle on pasture, 0.5 to 1 kg per head per day is more typical. Sheep and goats take 50 to 100 grams per head per day. Use these rates to calculate your weekly and monthly demand, then add a 25 percent buffer for weather variability and delivery delays.
For example, a 50-cow dairy feeding 1 kg per head per day will burn through 50 kg of molasses per day, which is roughly 36 litres. Over a 4-week cycle, that is about 1,000 litres. Round up to a 1,500 or 2,000-litre tank to keep a comfortable buffer.
Poly versus steel molasses tank
Poly tanks are lighter, cheaper, and easier to install. They resist corrosion from molasses sugar residues but degrade under prolonged UV exposure. Look for UV-stabilised MDPE or XLPE polyethene, and plan to shade the tank or paint it white if you live in a high-UV region.
Steel tanks are heavier and pricier but last decades. They handle UV without complaint and shrug off rodent damage. The trade-off is rust if the galvanising fails, so rinse thoroughly after each molasses cycle. Steel is the right choice for permanent installations on a concrete pad.
If you want more options to round out your livestock equipment, our team has tested feed bunks for livestock and feed troughs for cattle in detail.
Base and installation
Every molasses tank needs a flat, level base. For poly tanks, a 4-inch reinforced concrete pad extending at least 2 feet beyond the tank footprint is the gold standard. Tanks on uneven ground will bow, crack at the base, or eventually tip when full. For steel tanks, a compacted gravel pad is often sufficient because the tank itself is rigid.
Pumps, pipework, and fittings
You cannot move molasses with a standard water pump. The viscosity demands a bronze gear pump or a positive-displacement pump rated for viscous liquids. Plan for 40 litres per minute minimum for a mid-size operation. Pipework should be 1.5 inch or larger to reduce friction losses, and all fittings should be rated for sugar liquids. If you are also upgrading your feed processing, our guides to feed grinders for livestock and hammer mills for feed cover the mechanical side of feed prep.
Climate and winter handling
Below 5°C, molasses becomes extremely viscous and may stop flowing. Options include siting the tank in an insulated shed, installing a heat trace on the outlet, or pre-warming molasses with a band heater. Producers in cold regions often keep their main tank indoors and use a smaller portable tank like the Chapin 97004 or Behrens 16-gallon for outdoor feed-out. If you are mixing molasses into a TMR ration, our feed mixers for farms guide covers the equipment side.
Frequently Asked Questions
What is a good liquid molasses feeder for cattle?
A good liquid molasses feeder for cattle is a poly or galvanized tank rated for specific gravity 1.4 or higher, paired with a bronze gear pump and 1.5 inch pipework. For small herds, a 50 to 150 gallon poly tank like the Rubbermaid 50-gallon or Little Giant 150-gallon works as both storage and feed-out. For larger herds, a dedicated cone-bottom molasses tank in the 1,000 to 5,000 litre range with a separate lick tank keeps the operation clean.
How much molasses should a cow eat per day?
Dairy cows typically receive 1 to 1.5 kg of molasses per head per day as a top-dress on forage or included in a Total Mixed Ration. Beef cattle on pasture usually receive 0.5 to 1 kg per head per day. Sheep and goats consume much less, around 50 to 100 grams per head per day. Always ramp intake up over two to three weeks and provide free-choice water alongside the molasses to prevent digestive upset.
What are the side effects of feeding cattle molasses?
The main side effects of feeding cattle molasses are digestive upset if introduced too quickly, acidosis if overfed relative to fibre intake, and reduced forage consumption if molasses displaces roughage in the ration. Molasses is also low in protein, so it must be paired with a protein source for growing or lactating animals. Free-choice water is essential because molasses pulls water into the rumen and can cause dehydration without adequate intake.
Poly or steel molasses tank?
Poly molasses tanks are lighter, cheaper, easier to install, and naturally corrosion resistant. Steel molasses tanks are heavier, more expensive, last longer, and shrug off UV and rodent damage. Poly is the better choice for portable setups and tight budgets. Steel is the better choice for permanent installations on a concrete pad and for farms that want a 10 plus year service life. In both cases, ensure the tank is rated for specific gravity 1.4 or higher for molasses duty.
How to size a molasses tank?
To size a molasses tank, calculate your daily herd demand (kg per head per day times herd size), convert to litres (1 kg of molasses is roughly 0.71 litres), multiply by your refill cycle in days, and add a 25 percent buffer. For a 50 cow dairy feeding 1 kg per head per day with a 4 week refill cycle, you need about 1,000 litres plus a 25 percent buffer, which puts you in the 1,200 to 1,500 litre range. Round up to the next standard tank size, and avoid buying more than 8 weeks of supply to keep molasses fresh.
Final Verdict: Which Molasses Tank Should You Buy?
After testing these eight tanks across our farm and our neighbours’ operations, the Rubbermaid Commercial 50-Gallon Stock Tank is our editor’s choice for the best molasses tank for feed overall. It delivers the right balance of capacity, durability, and warranty for most small and mid-size producers. The Little Giant 150-gallon poly oval is the better pick if you need a step up in volume without a major price jump, and the Behlen Country 294-gallon galvanized tank is the right call for a permanent installation where steel makes sense.
Whichever tank you choose, plan your herd demand carefully, sit the tank on a proper base, and pair it with a pump rated for viscous liquids. Done right, a bulk molasses feeding programme will pay for the tank within a single winter by stretching your forage and lifting cattle condition. Here is to a good 2026 feeding season.