????????? ?? ??????: ????????? ????? ?? ?????? ????? ?? ??? ???? ????????? ?? ????? ?? ???? ???, ????? ????????? ?? ?????? ?????? ?? ??? ???? ????? ?? ???? ???Right before adding water towards the tank, it ought to be sufficiently cleaned. Use an answer of potassium permanganate, i.e., KMNO4 (antifungal agent), to wash the tank and leave it for 24