My smallest guppy in the tank has unfortunately had his tail nipped in a few areas. I do try to avoid using medication but I’m thinking of treating with melafix in case it’s fin rot or turning into to fin rot. I’ve seen guppies tails heal within a week that have been split with 75% daily water changes. However, his tails nipped in more than one area at stated. Has anyone had any luck using this before? I’ve never used melafix before so I’m not sure. Any help would be appreciated. Thank you.