Ok so the first question is how fast can signs of ich show up? and the other one is will my other fish get ich? So I had ich in my tank a few months ago and lost all my fish =/ so I waited about 2 and a half months before getting a new fish to make sure all the ich would have died and I had no problems. i started off with a damsel to make sure that it did not get ich when I put him in my tank and we was fine so I got a hippo tang. so after about a month after I got my hippo tang I got a bartlett's anthias and still no signs of ich, untill last night. In the morning when I fed my fish there were no spots at all but by the time the lights went off my hippo tang had spots on him and it looks just like ich. So the only thing I can think of is that the ich came from the anthias but it is not showing any signs of ich, and I didn't put any water from the lfs in my tank at all. I am acclimating my hippo tang to the QT water right now and I am going to do the hyposalinity treatment to try and kill the ich.