and the fish moved to clean water. A bath with formalin is prepared in the following proportions. Prepare water in the same way as in the previous model, only 1 boat. 1 ml of formalin per 5 to 6 liters of water. The bath must be prepared in advance. to make the formalin dissolve well. The duration of the bath is from 12 to 15 minutes, it is carried out 1 time per day.
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