Anybody every use aquari-sol for parasites or ich? Does it work on internal parasites? Does it work well at all? I'm thinking on adding some friends to Depot's tank. The only way to buy comet goldfish at the local store is through the feeder tank. It looks clean of disease but there is overcrowding and stress. I haven't had any luck with goldies since Depot. Fours years of trying to get her a friend and they all die. I almost bought a fancy goldfish once because they are kept in nice tanks, as in "not going to be fed to something". I can't stand them though. They're deformed. I'm sick of trying to quarentine them so I was thinking to just overdose the tank a bit with this parasite preventative and see how that goes. Any opinions?