LOL Byron, we were posting at the same time.
I'd be leery of using acids to lower ph. They can be harmful and often because of buffering compounds in the water the ph will rebound right back where
Attempts to lower pH frequently fail, or are temporary at best. And fluctuating pH is more stressful and debilitating to fish than a steady pH that is
Future attack cat!
Thank you Sandybottom! I will do exactly as you advise. We certainly are grateful for the help. He looks no better today.