Do you test your water frequently? And what test kit do you use? I use an api, if your nitrites and ammonia were above -0- then it could have been the problem, also a higher temp (higher than 80 can cause lower o2 levels in the water (the higher the temp the lower the dissolved o2 in the water).
I have 16 cichlids in a 55g tank, I have an ehiem canister filter, biowheel (penguin) filters, and I still use a small bubble wand, I keep my water temp at about 77, my nitrites are 0, ammonia at 0... I do water change day on wed, and vacc day on sat (this week is backwards because I was sick this weekend and so was my children so it will be opp for now on) However my 6 tanks get 2 waterchanges and one vacc a week. W/ an overstocked cichlid tank I would reccomend a heavy waterchange regimin. I have a low fish loss and very healthy happy fish w/ this.
I have 16 cichlids in a 55g tank, I have an ehiem canister filter, biowheel (penguin) filters, and I still use a small bubble wand, I keep my water temp at about 77, my nitrites are 0, ammonia at 0... I do water change day on wed, and vacc day on sat (this week is backwards because I was sick this weekend and so was my children so it will be opp for now on) However my 6 tanks get 2 waterchanges and one vacc a week. W/ an overstocked cichlid tank I would reccomend a heavy waterchange regimin. I have a low fish loss and very healthy happy fish w/ this.
