????????? ?? ??????: ????????? ????? ?? ?????? ????? ?? ??? ???? ????????? ?? ????? ?? ???? ???, ????? ????????? ?? ?????? ?????? ?? ??? ???? ????? ?? ???? ???Prior to including h2o for the tank, it ought to be sufficiently cleaned. Use an answer of potassium permanganate, i.e., KMNO4 (antifungal agent), to wash the tank and go away it for twenty-f