female fighter

hi all, so i set up a sorority a few months ago, everything has been fine, hierarchy got established and since then there has been very little squabbling. lately i have only one or two active fishies and all the rest will just lie on the floor or a plant apart from feeding time. any ideas? ...

Tank size: Was in 215 Litres, moved to Quarantine 12 Litres yesterday.  Generally same readings on both aquariums. pH: 8.2 ammonia: 0 nitrite: 0 nitrate: 20-40ppm (I find my test not brilliant at this, when I take a sample to the LFS it is usually 0) *kH: 100mg/L *gH: Between 125-250 mg/L tank...