[url=http://www.aquariumadvice.com/showquestion.php?faq=2&fldAuto=32 said:
Allivymar[/url]]High temperature is an effective treatment.
Ich appears not to be able to survive temperatures above 86F. By raising temps to above 86F one can kill all the parasites; generally, 4-5 days after the temps have been raised above 86F you will see a reduction in white spots on your fish. It is best to continue temps above 86F for at least 2 weeks to ensure all the parasites have been killed. Do not raise temperatures too quickly. 1 to 1 � degrees F every 12 hours is best, although if you keep your temps very low you may need to shorten that to 1 degree F every 6 hours. Raising temps too quickly can stress fish. Keep in mind, Ich multiplies more quickly at higher temps below 86F; it is necessary to find a balance between raising temps slowly enough not to stress the fish and quickly enough to keep the fish from becoming too infested with the parasite. Also, be sure all the fish/invertebrates in the tank can handle temps that high; if you�re not sure, do some research and ask.
**High temps reduces the amount of oxygen in the water. Increasing surface agitation, either by lowering water levels if one has a hang on back filters so the water falls further, or adding addition aeration is recommended.