Did the meds you used work on parasites like worms? Look up parasites and see if anything looks like what he has. I can't tell in your pic.
I would recommend a quartine tank as well if your worried and treat him in there
Hi. Funny cause I just picked up 10 of these today. I think the tend to be shy at first. When I introduced mine they seem in a school and later disappeared behind rocks. Wasn't til I fed that they came out eventually. I know they do get used to us feeding and should come after the food. You may...
I still use my Python after many many years. Best tool I ever got for the aquarium. Only part that needed replacement was the part that connected to your faucet. Mine was plastic. I replaced it with metal. The picture above looks like it comes with a metal one.