Hey everyone. Im new to all of this aquarium stuff and looking for advice. I have a 55 gallon freshwater tank with an oscar, jack Dempsey,and two pelvis. I cycled the tank for about two week and they were doing fine until I bought a catfish from terrys aquarium. My tank got infested with ich. I've raised the temp to 82, bought aquarium salt, and bought rid ich by kordon. It seems to be that there doing ok but I wanted advice on how to treat and do water changes during this situation?