No, I'm really not sure, it was just the closest thing with symptoms that matched what I saw :-( all I really know is I got 3 Cory's and they died and so did 3 I already had. Their mouths looked red which is why I thought maybe this is what was wrong. I really have no idea, but I will definitely be sticking to my lfs for fish from now on instead of falling for sales at petsmart.