thanks alot my tsn is still small about 8 or 10 inches in my 125 i will do a water change in the morning. im happy thay will regerg the rocks because he wasent eating because of it. i was also wondering what els i can feed him because i finally got over a realy bad out brake of ick on him from gold fish and im feeding frozen silver sides know is there any thing els i can feed him and my alligator gar as well? and i want to put a arawanna in the tank how big am i going to have to get one that my gar wont eat he is almost 22 inches ?