my clown deff has ich! i can see white spots all over its fins. none of my other fish appear to have it on them. what should i do? do i remove the clown? or should i just leave it? it is kind of hanging out in the corner but still comes out to eat. i had an ammonia spike up to 1.0ppm a couple days ago. could this have caused it? please should i qt?! i dont want to stress the fish out more tho. but dont want my other fish to become infected. help!