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Airmax Stock Tank Defense, Livestock Water Trough Cleaner, Clean Drinking Tanks for Horse, Cattle, Goat & Chicken, Safe & Easy-to-Use Cleaning Tablet Treatment for Farming & Agricultural Use, 24 Tabs

  • Based on 2,282 reviews
Condition: New
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This item's return window has been extended for the holiday season: Returnable until Jan 31, 2026

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Availability: Only 10 left in stock, order soon!
Fulfilled by Amazon

Arrives Wednesday, Nov 19
Order within 23 hours and 56 minutes
Available payment plans shown during checkout

Size: 24 Tablets


Features

  • Keep Your Stock Tank Clean & Clear: Stock Tank Defense tablets contain natural beneficial bacteria specifically formulated for stock tanks, water troughs, and other livestock watering containers.
  • Bacteria Treatment Breaks Down Organic Debris -- Beneficial bacteria and enzymes remove debris, maintaining clear waters for animals to drink. Apply tablets when water temperatures are above 50F.
  • Easy to Use -- Simply toss one dissolvable tablet into a stock tank (up to 150 gallons) every 1-2 weeks or when a water change is made. Ideal for farm, ranch, barn, agriculture, and equestrian use.
  • Improves Water Quality -- Beneficial bacteria are a healthy part of any ecosystem. Sometimes there are not enough naturally occurring bacteria in an environment, and bacteria treatments are needed.
  • Safe for Animals -- All natural and safe for horses, cows, goats, deer, pigs, sheep, livestock, poultry, chickens, birds, ducks, fish, dogs, pets, and wildlife.

Product Dimensions: 6.5 x 3.5 x 3.5 inches


Item Weight: 1 pounds


Manufacturer: Airmax, Inc.


Is Discontinued By Manufacturer: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Nov 19

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews


  • clean your stock tank in a flash
Size: 24 Tablets
This product is great, making cleaning the stock tank very easy and keeps the water fresh longer. I clean my tank every week and the water stays of acceptable quality for that time, and the algae that grows on the sides comes off effortlessly with a scrub sponge, leaving no residual stains or marks. Without Stock Tank Defense, the tank just won't come clean as I like, even with 10x the scrubbing. This product keeps my horses happy and saves me tremendous time in cleaning. It is the best product and totally safe for horses. My horses love their water! On the shipping from Amazon, about 1/4 of the tablets were damaged and crushed, fyi. But I would order again through Amazon due to availability and lower cost than I can find locally. ... show more
Reviewed in the United States on July 5, 2025 by Dr. Sherry Yale

  • Keeps tanks clear and clean
Size: 24 Tablets
Why did you pick this product vs others?: Very good product and works as described. Makes keeping stock tanks clear easy.
Reviewed in the United States on June 30, 2025 by Michael A.

  • They help
Size: 6 Tablets
Why did you pick this product vs others?: Helps keep the water from turning all green and nasty so quick in the heat of the summer. I think it also makes the water tank easier to clean.
Reviewed in the United States on July 12, 2025 by Amazon Customer

  • Kind of sort of maybe works??
Size: 24 Tablets
We've purchase this product more than once thinking that maybe it'll make a big difference. Maybe it does. Maybe. We still have to clean the 150 gallon water tank for the horses. The claims are big but the results seem to be little. It's not pricey so we will continue to use it. Nothing beats cleaning the water every 2 or 3 days though minimum if you want clean clear water! Elbow grease says it all! ... show more
Reviewed in the United States on May 26, 2023 by Robert B. & KT

  • Really works.
Size: 24 Tablets
This product really works in our horse through.
Reviewed in the United States on July 11, 2025 by A normal person

  • Doesn't work
Size: 24 Tablets
Does not work. At all. Wishing for a zero star rating. Save your money. Why did you pick this product vs others?: Description deceived me.
Reviewed in the United States on June 27, 2025 by Lauri Malone

  • it works
Size: 6 Tablets
I use these in my water collection IBC tote and, if used as directed, it saves me a lot of time when I drain the tote for the last time at the end of Fall when I discontinue water collection in freezing winter months. It keeps the tote clean enough that I don't have to spend time and water hosing it out when totally drained. Just wish they still offered the pack with 10 or 12 I used to get instead of just 6. Now paying more for less. ... show more
Reviewed in the United States on May 24, 2025 by LLT

  • Works great
Size: 6 Tablets
Dissolves great and works great
Reviewed in the United States on July 7, 2025 by Vickie Lawson

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