I would not feed him medicated food unless he absolutely needs it, it sounds to me like you have a healthy fish. Maybe just the salt, it does all the things that your anti protazoan medicine would do... good luck with him though, my little EBJD sounds about the same as yours, as i said before i used salt, 1 tbs per 5 gallons, that is what I did and I had large amounts of success with him.