Searching for reliable stock tank covers to protect water troughs and cold plunge tubs? This guide highlights five well-suited options. Each product fits common 100–150 gallon stock tanks and 2x2x6 or similar configurations. If you’re maintaining clean water, extending tank life, or keeping cold-water therapy setups insulated, these picks are strong contenders. The table below compares key attributes to help you decide quickly.
| Product | Size Fit | Best For | Notable Feature |
|---|---|---|---|
| MQLD Rubermaid 100 Gallon Cover | ~54″ x 35″ x 6″ | Small to mid-size tanks, outdoor use | Zipper access for quick water checks |
| COSFUN 100 Gallon Oval Cover | 53″ L x 31″ D x 6″ H | All-weather protection, debris shield | 600D Oxford with waterproof coating |
| Polar Protector 170 Gallon Cover | 2 x 2 x 6 ft footprint | Cold-water therapy and ice baths | Waterproof 600D canvas, durable |
| Gecic 4Ft Stock Tank Cover | 49″ L x 28″ D x 8″ H | Oval tanks, flexible weather sealing | Strong webbing strap, reflective strips |
| MQLD Rubermaid 150 Gallon Cover | 61″ L x 42″ W x 9.5″ H | Larger tanks, heavy-use setups | Enhanced bottom bungee for secure fit |
MQLD Rubermaid 100 Gallon Waterproof Stock Tank Cover

The MQLD 100 Gallon Cover is designed for stock tanks around 54 inches long, 35 inches wide, and about 6 inches deep. It’s best for small to mid-size outdoor tanks used for livestock drinking water or casual ice bath setups. The standout feature is an upgraded zipper access at the seams, enabling quick water checks or partial access without removing the entire cover. A bottom bungee cord secures the cover to resist wind and weather, helping maintain water cleanliness and temperature. If you need ease of use alongside protection, this is a solid pick.
- Best for small to mid-size stock tanks in variable weather
- Better for quick water access without removing the entire cover
- Avoid if you require heavy-duty insulation for extremely cold climates without wind protection
COSFUN 100 Gallon Oval Stock Tank Cover

The COSFUN cover shields most 100-gallon stock tanks with a large oval footprint. It measures approximately 53″ long by 31″ deep by 6″ high, making it compatible with a broad range of tanks. The material is a heavy-duty 600D oxford fabric with a waterproof, UV-coated finish, designed to resist rain, tears, and cold cracking. This option prioritizes all-weather durability and debris protection, helping keep water clean and reducing maintenance time. It is a practical choice for outdoor use where sunlight and precipitation are considerations.
- Best for all-season outdoor protection
- Better for minimizing maintenance due to debris buildup
- Avoid if you need a built-in zipper access for frequent water sampling
Polar Protector Stock Tank Cover

The Polar Protector cover is crafted for galvanized 2x2x6 stock tanks and is built with tough 600D canvas. It features handles, a tightening buckle, and a drawstring for extra security, aiming to keep water clean by blocking debris and insects. Its insulation attributes help maintain colder water temperatures for extended cold-water therapy or ice baths, supporting longer sessions without frequent re-cooling. The design is meant to endure harsh weather and heavy debris impact, making it suitable for rugged outdoor settings.
- Best for cold-water therapy setups and long exposure to outdoor elements
- Better for keeping water colder longer due to insulation
- Avoid if you need a lightweight, low-profile cover
Gecic Horse Trough Cold Plunge Cover

The Gecic 4-foot stock tank cover is 49″ long by 28″ wide by 8″ high, designed to fit most 4-foot oval stock tanks used for cold plunges or horse troughs. It includes a strong webbing snap-lock strap to prevent wind from lifting the cover, helping maintain water cleanliness and temperature. The front and back feature reflective strips, improving visibility at night. This option balances secure fit with user-friendly installation and is suitable for outdoor use where weather can be a concern.
- Best for medium-to-large oval tanks that require secure fastening
- Better for nighttime visibility due to reflective strips
- Avoid if you need a dedicated zipper for pause-and-check water access
MQLD Rubermaid 150 Gallon Waterproof Cover

The 150-gallon MQLD cover fits roughly 61″ long by 42″ wide by 9.5″ high tanks, offering a robust option for bigger stock tanks. The upgraded bottom bungee helps secure the cover against extreme weather, and reflective strips improve visibility. The cover aims to keep the tank clean and at stable temperatures, making it a suitable choice for more demanding outdoor setups or larger livestock troughs. It shares the same practical design language as the 100-gallon model with an emphasis on secure, weather-resistant performance.
- Best for larger, heavy-use outdoor troughs
- Better for robust wind resistance due to reinforced bottom bungee
- Avoid if your tank is smaller than 61″ × 42″ footprint
Buying Guide: How To Pick The Right Water Trough Cover
- Size compatibility: Match the cover to your tank’s exact length, width, and height. If in doubt, choose a cover with a slightly larger capacity than your tank.
- Material and weather resistance: Look for waterproof, UV-resistant fabrics and durable stitching. For cold climates or water therapy use, insulating materials and reflective elements add value.
- Security features: Zippers, bungee cords, buckle straps, and secure fasteners prevent wind uplift and debris intrusion. Consider covers with mid-seam access if frequent water checks are needed.
- Intended use: If you’re primarily cleaning and protecting from debris, a lighter-weight cover may suffice. For cold-water therapy or ice baths, prioritize insulation and temperature retention.
- Visibility and safety: Reflective strips or bright accents enhance night-time visibility, reducing accidental collisions or tripping near tank areas.
- Maintenance: Choose materials that resist tearing and are easy to wipe clean. Some fabrics resist mold and mildew when properly dried.
FAQ
- Q: Will a stock tank cover keep water warmer? A: Some covers with insulation and reflective features help retain cold water for longer but are not a substitute for dedicated heating in very cold climates.
- Q: Can I use any cover on any tank? A: Not all covers fit all tanks. Confirm the exact length, width, and height, and compare to the product’s stated dimensions.
- Q: Are these covers waterproof? A: Most are designed to be water-resistant or waterproof, but performance varies with fabric type and seam construction. Check product features for waterproof ratings.
- Q: Do covers require assembly or tools? A: Most require no tools and install with simple securing mechanisms like straps or zippers.
- Q: Which cover is best for large outdoor tanks? A: For larger tanks, the MQLD 150-gallon cover is a strong option due to its size and secure bottom bungee system.
- Q: Do covers protect against pests? A: Many covers help reduce debris and insects by sealing the top, particularly when fitted tightly and used with tight seams.