I have an adult male, 5", Southern Painted Turtle. He housed in a 40 Gallon Breeder Aquarium, with 33 gallons of filtered city cold tap water. The aquarium is resting on top of a 40 gallon cabinet stand from Petco, Aqueon Filter Canister 200GPM, Aqueon Pro Heater 150W, Mega Ray UVB/UVA bulb mounted to an adjustable height stand, and a ZooMed Large Dock. There are a couple of large artificial floating plans with a large long artificial vine and 1" stones on the bottom glass. He moves and pushes things around on the bottom. Water temp is steady 80F.