I have (had) two electric blue ales noticed one acting sad one day next dead and now the other done the same thing nothing appeared to be picking on them or anything no sign of sickness on the fish tank has been sat up for awhile now like6 months all the other fish are happy and fine just curious what happened to these to guys they were beautiful fish
i had one for 2 months and one for around a month i have several other cichlids that have been in the tank for several years they all seem fine the electric blue that died first would just sit around like it was breathing very hard one unusual thing i noticed when they died they both had there mouths wide open
these fish were picking on each other at first then appeared to stop could just the stress of knowing the other one was on the other side of the 55gl tank have killed them?
I would not expect them to die without actually beating up on each other. Breathing hard and a wide open mouth sound like possibly nitrite poisoning, but I don't know why the other fish are not affected. What are your ammonia, nitrite and nitrate readings? Also what temp is the tank?
Temp 75 is okay (if a bit on the cool side) but I was concerned about high temps robbing the water of O2, obviously not the case. Get some test kits as they will be invaluable to you now and in the future.
It seems strange that your ahlis would die off (in the same manner) while the rest of your tank is fine. I would definitely keep an eye on your other fish to make sure the your recent ahli purchase(s) didn't bring a disease into the tank with them...