I have four 15 gallon regular tanks. All need to be cleaned but held water as of two weeks ago. I used them to hold my breeding stock of Betta. Two of the tanks have gravel, and two have glass for the tops but no backsplash. $20 for all four or 7 each. Trades for coral possible. interested in mushrooms, or softies. No toadstools or devils hand. got plenty of that!