When I lost my first guppy, I think I was too late trying the melafix. One of my mollies had a small crescent moon shaped piece of his tailfin missing, I was scared after what happened to the guppy so I treated the tank and within a few days his tail was good as gold.
With that said, I now have a guppy (has been treated with the melafix) because tail wasn't looking the best but no change, tail is the same. No worse, no better :-?
But, I am guessing like all "additives" you should only use as a last resort???? Unless, of course, you know exactly what you are dealing with, would that be fair to say BlueandKim????
Mustcooktea...how is the neon doing? Any changes?