So I did a water change in my payara tank last night just like I do every week but this time I notice that my armatus was breathing heavily afterward.The redtail and scomb seem to be unaffected though.I checked on him a few hours later and he seemed to have slowed his inhaling somewhat so I turned off all lights and went to bed.This morning I went down to take a look and he is still inhaling visibly but not as much as hours ago and at least it is still alive,I obviously dont want to lose my prized sabertooth so I welcome any advice.