size of tank is 10 gallon and i put heater at 26 degree Celsius . tank mate is 2 other black molly 1 platy 1 sordtail, 2 blue gourami ,and 2 rose barb.
i dont know ammonia, nitrite, and nitrate but i changed 50% water 4 day ago and also cleaned filter . tank is 1.5 month old. and here feathers...