Can someone please help. I have Malawi cichlids In my 200L tank. I have a 2ft air pump, pump outlet entering at the top breaking my water at the top of the tank. I've had two liquid water test at local aquatics stores both times water has come back spot on, no concerns. In my eyes I have my tank set up in a perfect condition for malwis but they seem to be hovering at the bottom of my tank gasping for air I did wonder if it might be malwi bloat or swim bladder disease so I've not fed them for 48 hours now and I put in a few frozen peas as I read that they can be like a laxative for fish to help clean out there system a bit. Any opinions will be appreciated. Thanks in advance.