I'll try to keep this as short as possible while also providing as many details as I can so you can make an educated decision. About 3-4 weeks ago I purchased a small 2" Salvini from a lfs, and upon putting him into my quarantine tank noticed that he had some obvious trauma to the right side of his face and eye. The eye was clouded over and the whole area of his face below the eye was a darker color and looked almost like he had stayed pinned against a heater and got burned. I figured it was trauma that occured while the kid was trying to catch him in the fish tank at the store. after about a week the injury appeared to be getting better, the eye had started to clear up but he still wasn't eating much and hid all day long. After a whole week of not seeing him I decided to take out the rock cave I built just so I could better monitor him, and replaced it with a small ceramic pot so he would still have some security. When I removed the rocks and finally saw him for the first time in a while I realized that now both of his eyes were extremely bulged and I immediately tested the water. My ammonia reading was 1.0 so I did a huge water change to try and dilute it for him a bit. This is a new 29 gal tank setup and apparently the stuipd HOB filter that came with this "deluxe starter kit" is not worth a damn, so I ordered an Eheim Pro II 2026 which should be arriving today. Since I tested the water I have stopped feeding and have been doing massive water changes twice a day, adding epsom salt and melafix to treat the pop-eye but he has not improved in 3 days now. For the past day and a half he has just been laying on the bottom on his side with very little gill movement, and when he does attempt to swim he looks more like a shrimp than a fish. I want to think that he'll be able to pull through but I'm worried about permanent damage to his vision and gills. Should I just leave him be and see if he makes it with the water changes and new filter going in later today? The weird thing is I have a small 1.5" EBJD in the same tank with him who has had absolutely not visible problems whatsoever. I have been able to maintain the ammonia levels below .25ppm with the water changes, but I'm probably going to need to get that filter up and running and somewhat established before it is completely taken care of. any thoughts? thanks in advance.