Haha thank you, sir. I actually raised him from a little tad pole (hence his name, Tad....I know, I know. Original...but I named him when I was 5, cut me some slack lol). But I just put the filter in. Meaning I took him out of the tank, then noticed his feet, cleaned his tank out, and then put the filter in. However, the toe that's red looks like it's pretty much already healing, so it must have happened a while ago. The other foot still looks a little fleshy, and almost like it's bare bone. I've never used any kind of water additives for him, not even for the tap water because I never knew I was supposed to when I was younger, and I didn't want to change it after so many years. But apparently I've done something right all these years. I've always been very wary about putting stuff in, so can I trust this antibiotic stuff?? Also, the reason I put the filter up so high is so he didn't jump up on it. He is a lunatic at times lol