Review on 🐢 Turtle Creek Farm, Inc. Stock Tank Secret - Brown (Size: 9" x 7") by Ruth Reyes

I purchased Stock Tank Secret and Stock Tank Defense to try in my 97 gallon Hastings drinker. Stock Tank Secret is harder to use; You should push it down with a rock or something to keep it from floating to the surface where horses are more likely to play with it or scavenge it. A week later, the aquarium turned green from algae. I will not buy again. Grandfathering against tanks has become easier; just drop a plain, round, white tablet (e.g. a chlorine tablet) into a clean fresh water tank. It will dissolve within an hour. That kept the water clean enough for 10 days. But no product lasts a month as advertised.