this i been going on for about aweek and a half i.ve tried every thing my fish are all stressed out and breathing heavy and some stopped eatingeven my cichla stopped eating now i now somethings wrong and my arows sits on the bottom of the tank i checked my water no nitrates or nitrites ph is at 6.7 i have a little ammonia but not enough to worry about they had a slight case of ick a few days ago i treated it and it cleared up then my severum got a fungle infection so i treated the tank with melifix i've done a small water change today just get the meds out but don't no what else i can do any ideas