I've been fighting a water problem in my tank, just about got it under control, but the back of my arowana's gills are fanned out. I'm gonna try to attach a pic (haven't had much luck with attachments). I think it's due to the water issue from last week but while my one oscar, who is the one who signaled the problem, has gotten better, the arowana hasn't changed. He's acting fine but I just want to make sure the gills will go back down. Any help is appreciated.

