water temp and ich..

+1 on looking for other things. A normal, healthy fish wont get ich. Your temp probably isnt causing it. What are your other params? How old is the tank?

 

I have a foxface that was having reoccurring ich problems because it had a near death encounter and became extremely stressed. I raised the temp to about 82 and by morning no ich, when I lowered the temp, ich came back. I left it at 82 for about 3 weeks, the other fish were fine with the temp and it's been a month and haven't seen any ich since... And yes it is true that ich is in all saltwater environments and if a fish's immune system is compromised due to stress or whatever else it can attach itself, otherwise, normal healthy fish will be able to fight it off naturally.

 

I guess I should have said that in a different way.. higher temp won't "get rid of it", per se.
If you have the fish in a quarantine for instance... a higher temperature will help move along that ich life cycle. Keeping your tank high or low won't wipe it out for good.

 

That's correct. The temperature is not "causing" the ich to keep coming back.

 

I think my foxface doesn't get it anymore because it's no longer stressed from it's near death experience, however in my case, keeping the temp high kept it from coming back while the fish was able to heal and de-stress...

 

Well I don't mean my temp is making it come back what I ment to say is the 4 degrees it rises and falls is stressing my fish causing them to get it.

 

You can supplement your feeding with Garlic Guard to help strengthen your fish immune system to help fight it off. Is there an agressive fish that might be stressing the others?

 

I would have to say a 4 degree flux on temp over time will not stress out the fish. So it is my opinion this is not the cause of the stress. It could be another fish causing the stress or something else.

 

You would be better off setting the heater up to 79 as the center point then keep the swing to +or- 1F you would be far better off as would the fish . Cold blooded animals need a steady constant as possible temperature and with as little swing as possible as that will induce stress and that will lower the animals resistance to ich and bacterial infections .

80F is not all that bad as long as its constant..

 

If you really think it's the water temp variances (which I doubt it is because my lights raise my temp daily about the same amount) then get a chiller. I'd be willing to bet it's something else like your water parameters.