great info thanks neoncory the tank is 34gal with sand substrate, the tankmates are 1 dwarf gourami (male), 1 female molly, 1 molluy fry and 3 guppy fry (trying to move out as i dont want any females for my other tank (male livebearer) to breed with, 2 yellow panchax, 1 kuhli and the 2 other...