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What I have found, is that with Ich, it's not any particular temperature. I've ran tanks at 76 and some at 80-81, and haven't had problems with Ich. What does stress fish and make them more susceptible to Ich is fluctuations in temp., like tank temp drops 2 degrees at night and then by the end of the day with lights on, tank temp goes up. The smaller the tank, the more the fluctuation, and the more your fish get sick. A chiller or heater to stabilize temp is best. If A/C is used to manage temp, then make sure that at no point, A/C set down at night, or setting up when not home affects the fish tank. My experience, .02.What is the temperature in the tank the fish is/was in? If you run a "cold" tank (<78deg) fish gets stressed and will get ich. Raise the temp to 80/81/82 and in a few days the fish will recover.
I have run my 300g between 79 and 81 for many years with no ich. I'd not medicate the tank.
What is the temperature in the tank the fish is/was in? If you run a "cold" tank (<78deg) fish gets stressed and will get ich. Raise the temp to 80/81/82 and in a few days the fish will recover.
I have run my 300g between 79 and 81 for many years with no ich. I'd not medicate the tank.
I am no ich expert, but...This is useful with freshwater ich. Marine ich is not effected as much by temp- only speeding up the life cycle some so that it reproduces faster thereby increasing it's numbers faster.
I don't think the rise in temp is suppose to kill the ick. It speeds up the life cycle so your fish spends less time affected by ich and you can rid your tank from it quicker. Instead of leaving a tank fallow for 80 days at 76f you can leave it fallow for 70 days at 80f because of the speeding up of the lifecycle. The dates are just to get the point across, they are not actual days and temps.
Same here I actually feed this 3 times a week even though my fish are healthy. They love it and it can't hurt, just keep it off corals.![]()
I have had good luck with this.I got a new tang and he got ich and so did some of my other fish and it cure it ,as long as they are still eating.
Here is there link http://www.drgsmarineaquaculture.com/medicated-fish-food.cfm
Good luck hope everything works out.
I am just giving the reason why people raise the temperature when dealing with parasites, including ich. It is not to kill the parasite which was mentioned earlier.
Raising the temperature isn't suppose to be a cure all. It is supposed to be used in conjunction with other treatments. You still treat your fish in CU, hypo or whatever for the extended periods of time with higher temps. It will speed up the life cycle and kill the parasite in it's vulnerable reducing the time the fish suffers.
Great information, @melypr1985 this is correct. Raising the temp won't kill most ich, unless you raise it to temperatures that will cause harm to your fish and tank.

Great information, @melypr1985 this is correct. Raising the temp won't kill most ich, unless you raise it to temperatures that will cause harm to your fish and tank.
Yeah, I'm not saying he's downright wrong. My whole point is that when you make a statement like that it requires clarification. You have to explain all that, because there are tons of people who read these threads and comments. Some, especially people new to the hobby could take this temp thing the wrong way and try it only to kill their fish without pairing it with meds and QT. THAT is my point. I hate typing this stuff out, it always gets read wrong or whatever.
I only want to add that I think it's pointless to raise the temp in the QT or the display. I dont care if it speeds up the lifecycle of the parasite. It's just one more stressful thing the fish has to acclimate to. The parasite will die in the meds regardless of the temp so why put them through that one more thing? That's it. That's all. Happy Reefing folks![]()
Raising temp to 40C/104F has been proven to kill Cryptocaryon (all stages) in 1 hr. However, you'll also be left with a lifeless tank you would need to recycle.

