
I have had my setup for nearly 3 months. I have cleaned my tank out regulary and have not had any problems.However, i cleaned it out 2 day's ago and have noticed that the fish are now staying near the top of the tank most of the time.It is as if they are gasping for air,,,but i have checked the levels and all seem's to be ok.I wondered if anyone has any idea's as to why this is.
Thanx