About a week ago I brought home a clown pleco. The next day I noticed some white spots all over it. I called one LFS and they told me to get Quick Cure and it'll be okay. I ended up getting Super Liquid Ick stuff (sorry can't remember the exact name). I put that in and nothing happened. My fiance ended up getting rid of the sick fish 3 days after I brought it home. On the fourth day, we noticed that the other fish got ich too. I then went to the store to get more treatments and got Jungle Ich Tablets. The box said it would cure ich in 24 hours. It also said to remove the carbo from the filter and if needed to add another dose after 24hours and a water change. It's now 3 doses later and the fish seem to be getting worse. What should I do?