Best Stock Tank For Cold Plunge: Compare 7 Options

#1 · Best Overall

1. Rubbermaid 300-Gallon Stock Tank

• Capacity: 300 gallons
• Material: STRUCTURAL FOAM
• Material Type: STRUCTURAL FOAM

Best for: High-capacity outdoor plunge.

Why it ranks #1: Its 300-gallon capacity and structural-foam construction offer a substantial plunge basin; an oversized drain plug kit helps with emptying and cleaning.

A 300-gallon capacity sets this Rubbermaid Commercial Products tank apart, enabling a large-volume cold-plunge setup for buyers who prioritize room and water volume. Its structural foam construction, ribbed base, and built-in body stiffeners address durability and rigidity, while the oversized drain plug kit supports emptying and cleaning.

The seamless structural foam construction and built-in body stiffeners support a rigid basin, while the ribbed base adds load-bearing structure; those features suit a tank intended for demanding daily farm use. Its 300-gallon capacity provides substantial water volume, but also means filling and emptying involve a much larger quantity than smaller tanks. The oversized drain plug kit is specifically described as simplifying emptying and cleaning, and the tank is stated to withstand weather extremes for year-round use.

Skip it if you need a smaller fill volume or compact basin; MDMprint’s 150-gallon stock tank has half this tank’s stated capacity.

This suits buyers with space and water-handling capacity for a 300-gallon outdoor plunge, especially those valuing a rigid structural-foam basin and oversized drain plug. Its large capacity is the key boundary to weigh before choosing it.

Listed on Amazon as: Rubbermaid Commercial Products Stock Tank 300-Gallons Structural Foam Heavy Duty Container for Livestock/Animal/Cattle Feed & Water Outdoor Homemade Pool/Hot Tub/Bathtub & Pet Cleaning/Dog Wash

#2 · Best Mid-Size

2. MDMprint 150-Gallon Stock Tank

• Capacity: 150 gallons
• Material: Resin
• Material Type: Resin

Best for: Mid-size resin plunge tank.

Why it ranks #2: The 150-gallon resin tank measures 58 by 39 by 25 inches and has a 11⁄2-inch drain opening, balancing defined capacity with a smaller footprint.

A 150-gallon capacity paired with a 25-inch overall height gives the MDMprint stock tank more depth and volume than a shallow utility basin, enabling a more substantial cold-plunge fill. Its 58-by-39-inch exterior dimensions provide a clear footprint for planning placement, and the tank is made of resin.

The 150-gallon capacity offers more water volume than a 50-gallon tank, while the 25-inch height supports a deeper basin profile for plunge use. The 58-by-39-inch outside dimensions help you check floor or patio space before bringing it into position. A 11⁄2-inch drain opening and male resin drain connection identify the outlet arrangement for emptying; the supplied details do not state whether a separate fitting is included.

Skip it if you need a compact, shallow vessel; SOUTHRO’s 50-gallon tank measures 12 inches tall and has a smaller stated capacity.

Choose this MDMprint tank if you want a resin basin with 150 gallons of capacity and 25 inches of height. Its 58-by-39-inch footprint and water volume make space and filling logistics important considerations before setup.

Listed on Amazon as: MDMprint 150 gal. Stock Tank, Black, 58" L, 39" W

#3 · Galvanized Steel

3. Behlen Galvanized 169-Gallon Tank

• Capacity: 169 gallons
• Material: Alloy Steel
• Material Type: Alloy Steel

Best for: Galvanized multi-tank setup.

Why it ranks #3: Its stated 169-gallon capacity and zinc-coated alloy-steel construction offer a defined mid-to-large option with corrugated sides and a reinforced top lip.

A quantity of three 169-gallon galvanized tanks makes this Behlen Country listing distinct, enabling buyers to plan multiple water vessels rather than a single plunge basin. Each tank is described as zinc coated, with corrugated sidewalls, an extra-heavy-duty bottom, and a reinforced steel tube rolled into the top lip.

The 169-gallon capacity and 2-by-2-by-6-foot nominal size describe each galvanized stock tank, while the quantity of three supports a multi-vessel setup if that suits your space and workflow. Zinc coating is stated to protect against extreme weather conditions. Corrugated sidewalls, an extra-heavy-duty bottom, and a reinforced steel tube in the top lip are listed structural features; the item weighs 192 pounds, a practical factor to consider during placement.

Skip it if you need one lighter, smaller vessel; SOUTHRO’s 50-gallon tank is listed at 12 inches tall.

This suits buyers needing three galvanized tanks for a multi-vessel cold-plunge arrangement and who value the stated weather protection and reinforced construction. Each tank’s 192-pound weight and nominal dimensions matter when planning placement.

Listed on Amazon as: 50130048-09 Galvanized Stock Tank, Zinc Coated, 2 x 2 x 6 Ft., 169 Gallons – Quantity 3

#4 · Long Poly Option

4. Behlen 6-Foot Farm Flex Tank

Best for: Six-foot FarmFlex plunge.

Why it ranks #4: The 6-foot-by-2-foot Farm Flex model provides a large listed footprint in poly, although the supplied listing does not state its water capacity.

The six-foot FarmFlex round-tank designation gives this Behlen Country model a defined length for buyers planning a longer cold-plunge vessel, enabling a different footprint from compact tubs. Its title also specifies a 2-foot size and poly construction, while the FarmFlex description identifies livestock watering, dog bathing, and wildlife ponds as intended uses.

The title’s six-foot length and 2-foot size help establish the intended scale, while the supplied product dimensions list 72 by 72 by 24 inches; use those listed measurements when checking placement. Poly is the specified material, and the FarmFlex description characterizes the line as durable and versatile for farm and ranch applications. The supplied details do not give a capacity or drain specification, so those operating details cannot be determined from the listing information.

Skip it if you need a stated gallon capacity for planning; SOUTHRO’s 50-gallon stock tank lists its liquid-storage capacity.

This fits buyers considering a six-foot FarmFlex round tank in poly for a plunge setup where its listed dimensions work. Since capacity and drain details are not supplied, account for that uncertainty when planning filling and emptying.

Listed on Amazon as: 6ft. x 2ft. Farm Flex Round Stock Tank, Color Variety, Poly, Model# 52113068

#5

5. Behlen 8-Foot Farm Flex Tank

• Material: Poly
• Material Type: Poly

Best for: Long, low-profile FarmFlex tank.

Why it ranks #5: Its 8-foot-by-2-foot round Farm Flex format gives buyers a long poly option, but the supplied specifications do not provide a capacity.

An 8-foot length paired with a 2-foot height makes this Behlen Country Farm Flex tank a long, low-profile option, enabling buyers to consider a broad plunge basin rather than a compact tub. Its round form and poly material are specified, and the FarmFlex line is described as versatile for farm and ranch uses.

The stated 8-foot-by-2-foot size gives buyers a substantial length and a relatively low height to consider when planning a cold-plunge location. Its round tank form offers a different layout from rectangular stock tanks, while the poly material provides a clearly specified construction material. The supplied description characterizes FarmFlex tanks as durable and versatile and mentions livestock watering, dog baths, and wildlife ponds; it does not provide a capacity or drain specification for this model.

Skip it if you need a stated capacity before choosing; SOUTHRO’s 50-gallon stock tank has a listed liquid-storage capacity.

This may suit buyers prioritizing a long, round poly tank and who can plan around its 8-by-2-foot stated size. Its capacity and drain details are not supplied, so those specifics remain a boundary for plunge planning.

Listed on Amazon as: Farm Flex Round Stock Tank — 8ft. x 2ft., Model# 52113088

#6 · Recycled Plastic

6. Tuff Stuff KMT50 Oval Tank

• Capacity: 50 gallons
• Material: Plastic
• Material Type: Plastic

Best for: Recycled-plastic oval plunge.

Why it ranks #6: This 50-gallon oval tub uses 100-percent recycled LDPE and measures 41 by 30 by 15 inches, but its capacity is modest for a plunge.

Its 100-percent recycled LDPE construction gives the Tuff Stuff KMT50 a flexible, rubber-like quality, enabling buyers to choose a recycled-plastic vessel for a small cold-plunge setup. The oval tank holds 50 gallons and measures 41 by 30 by 15 inches, giving its footprint and shallow profile clear planning dimensions.

The 50-gallon capacity makes this a smaller-volume option than the listed 150- and 300-gallon tanks, which can suit a plunge routine that does not call for a large basin. Its 41-by-30-inch dimensions define the space needed for placement, while the 15-inch dimension signals a relatively shallow form. The 100-percent recycled LDPE is described as flexible with a rubber-like quality, and the listing identifies adjustable height as a special feature.

Skip it if you need substantially more water volume or height; MDMprint’s 150-gallon tank is listed at 25 inches tall.

This fits buyers seeking a 50-gallon oval tank made from recycled, flexible LDPE for a smaller cold-plunge setup. Check that its listed 15-inch dimension and 41-by-30-inch footprint suit your intended water depth and placement.

Listed on Amazon as: Tuff Stuff Products KMT50 Oval Tank, 50-Gallon

#7

7. SOUTHRO 50-Gallon Stock Tank

Best for: Compact, shallow plunge setup.

Why it ranks #7: The 50-gallon tank has a listed 12-inch overall height and 45-by-24-inch bottom interior, making it a compact but shallow plunge candidate.

A 12-inch overall height is the defining feature of this 50-gallon SOUTHRO stock tank, enabling a low-profile cold-plunge setup where a taller basin would not fit. Its solid walls and bottom provide a simple tank form, while the stated 52-by-31-inch outside dimensions help you plan its placement before filling.

The 50-gallon capacity keeps the water volume below that of larger livestock tanks, which may suit a smaller plunge routine or limited water-handling setup. Its 52-by-31-inch exterior footprint gives you concrete placement dimensions, and the 12-inch height makes it notably shallow. A 11⁄2-inch drain opening with a male resin connection gives the tank a defined outlet for emptying; the supplied information does not specify a drain fitting or installation method.

Skip it if you need a deeper plunge basin; MDMprint’s 150-gallon, 25-inch-tall tank offers greater stated capacity and height.

This suits buyers seeking a low-profile, 50-gallon cold-plunge tank with stated drain dimensions. Consider its 12-inch height and 45-by-24-inch bottom interior dimensions when deciding whether its shallow, compact bathing area fits your plunge routine.

Listed on Amazon as: Stock Tank, 52 in L, 31 in W, 50 gal, Black, Mfr: FG424300BLA-A