??????? ?? ????????: ?????? ?? ?????? ???? ????? ???? ??, ?????? ???? ?? ???????? ?? ??? ??? ???? ???The pH really should not be too large or far too small. A pH of close to 7.5 is nice. There really should be a continuing supply of oxygen from the fish tank. Ammonia and germs amounts must be controlled. It is best to observe Biofloc fish farming,