thank You Tippytrompoline, Hobgob, yes i did mix up the temp and life cycle, i was thinking of anouther parasite. I did a whole salt bath on my whole tank because the salt help kill the parasite you can not kill it once it is on the fish, it is in a protective shell sort of thing., the combonation of high salt and high temps makes for a environment that the parasite cant live in, i treated my whole tank. The fact that your fish were stressed from the fulxuating temps made the parasite easily attach to the fish. But that is not where the parasite came from, it had to be introduced to the tank in some way. as tippytrompoline stated. just because i made one mix up dose not mean that everything i staded is wrong, you are just saying what others told you when you asked this same question a year ago...people told you the wrong information, if you look at any wedsite talking aboutt ich it will say exactly what im saying...