What is wrong with my fish??

I had 2 calico faintail fish and recently one of them died, we think it had swimbladder. So we cleaned the water completely (I know your not meant to but we didn't want the other fish in the dirty water) now the remaining fish sits, sometimes floating around at the bottom of the tank, he is breathing and moving his flippers but not swimming around like he used to. He sometimes floats on his side  too and when I see him he is never eating. Could he have swimbladder too? Please Help!

[seattlemom2plus]

How are your fish now did everyone recover?