Raising the temp is the best solution for ick. Above 86 degrees. May want to go a little above that so you know that the temp fluctuations won't bring it below 86 degrees. I like setting mine at around 89 degrees for ick. Then if it's a hard case that doesn't seem to want to go away, then you will need to up it to 92 degrees with lots of bubbles from an airstone or wand. I had to do that once, as 89 degrees wasn't cutting it.