Nah, its not a water quality problem, My ammonia is 0, Nitrates are 5.0, Nitrites are 0 Ph 7.1, Temp is 81f, Its a 55 gal , fake plants, real driftwood, Playsand Substrate(very easy to keep the tank clean). Population is 3 matched(m/f) pair of Gouramis, 2 male Silver Dollars(my favorites), 1...