IVE HAD LUCK WITH 2 TIMES WEEK WATER CHANGES, SIPHONING IT OFF EACH TIME, GET UR TEST KIT FOR PO,AND GO FROM THERE. THAT SLIME REMOVER CRAP HAS ANTIBIOTICS IN IT IF IM NOT MISTAKEN, AND ANYTHING LIKE THAT YOU KNOW U DONT WANNA ADD, TRY TO BE PATIENT. GOOD LUCK!!!!!!