This is my new 38 gallon. I keep Guppies, Assassin Snails, and am storing Least Killifish. I keep it in the mid eighties. This is my twenty gallon. I keep it in the mid eighties. I have a Guppy Colony and Assassin Snails. I took a few females from this tank to the thirty eight gallon. This is my Ten gallon. I keep Assassin Snails and Least Killifish. It is in the mid eighties also.