"I purchased a 29 gal. tank to put two small oscars in until they got bigger. I also bought some guppies while I was at the store. Within the first few hours, two had died. I immediately moved them into the currently unoccupied 29 gallon so that they wouldn't make my other fish sick. There were only 3 left, so they were freaking out, so I put some of my other guppies, since I had so many (I breed them) in with them, aware of the risk of them getting sick too. Well, they did. BAD. Every single fish's fins were clamped. After 3 or 4 weeks of using jungle fungus tabs, I had little to show for it, just some dead fish and sickly live ones. I used pimafix and melafix in combination, and within 1 and a half weeks fish had no visible symptoms. They were still slightly contagious, other fish they were put in with were slightly ill for a few days, but pimafix worked on that too! Fungus is very hard to get rid of, but this is your best bet."