I am curious? my fish's always tend to Flick againts rocks, gravel driftwood,,and I dont know why?? everthing is normal and I do weekly water changes?? amonia 0, Nitirte 0 Nitrate at 40..But I have soft water Ph at 6.2..its always been like that....do you think its the PH??..they eat good swim good except the darn flickering...
