<a href=showthread.php?s=&postid=8669518#post8669518 target=_blank>Originally posted</a> by cayars
Changing the temperature in itself isn't going to help you out. It will only effect the cycle of the parasite. It will not reduce the number of parasites but only change the cycle.
You need to pull the fish and treat them properly.
I found what i was looking for, also using no sick fish:
Probably the easiest treatment in indoor systems
for Warmwater species is to raise. the water temperature
to 85°F for three weeks. Since Ich is a coolwatcr
protozoan, raising the temperature will kill the freeswimming
forms before they have a chance to
reinfect the fish.
A second method to mechanically treat fish
applies to raceway culture or pond culture, where
infected fish can be removed and placed in a raceway.
This treatment involves increasing the flow
rates as high as possible while still permitting the fish
maintain their position in the raceway. The increased
flow flushes away the free-swimming forms before
they have a chance to settle to the bottom and attach.