??? (????) ???? ??? ???: ????????? ??? ??????? ?? ???????????? ?????? ???? ????? ??, ????? ???? ?? ???? ???? ???Just before incorporating water on the tank, it ought to be adequately cleaned. Use an answer of potassium permanganate, i.e., KMNO4 (antifungal agent), to scrub the tank and leave it for 24 hrs to clean. This solution allows destroy each