Thanks for that quick response yesterday. I am finally getting a minute to write back after trying a few things.
Well i ended up doing about 50% new clean treated water and added a bit more coppersafe to compensate for the 50%loss of existing treated water. I turned filter off and have no lights on in the tank. The heater is on and temps are around 84. He has just been sitting behind the filter for the past day...struggling for each breath. When he sees or hears me near tank he does try to wiggle a bit to say hi, but you can tell he's stressed.
Now, I was going to let the water stay like it is until tomorrow before I do another water change...does this make sense? Or should I do a 100% water change tonight? Would it help if I added some aq salt in his tank each day or once is enough? Just searching for answers because I haven't seen any signs of him getting better from any treatments.
Anyone's advice is def a big help and I thank everyone's responses. I am just so determined to bring this little fishy back to his normal self.