I recently setup a new aquarium a few weeks ago and noticed today that my rainbow praecox now has white spots on him.
I’ve been watching them closely and noticed right away, and went to the store to get API ICH Super Cure. In the directions it says remove the carbon from my filter, but since it is the cartridge type the only way I could do that is if I cut a hole and take out the carbon. I read that doing that is better than having nothing in there at all. I also added some aquarium salt as well. All of my fish are doing fine he is the only one infected right now. I do have a ghostfish in there so I had to do a half dose to be safe. I also have a Roseline shark, pearl Gourami, and rainbow shark. I’m kinda bummed because after the treatment is over I have to put a new filter cartridge since I ripped out the carbon from the first one, and I read that restarts the whole cycling process. Is there anything else I should do? Any and all help would be great!!!