Hi everyone, I was gonna perform a water change today but all I did was clean the glass and remove hair algae off the rocks and sand. I noticed my newly mixed water wasn’t the same temp as the tank so I threw a heater in there and decided to wait until I put it in the tank. During that I cleaned my pumps and protein skimmer but left my powerhead on so the fish have some flow for oxygen. Now they are breathing heavily and I don’t know what to do. I didn’t disturb the sand bed too much and didn’t add anything to the tank. Any help would be appreciated