Raise your temp slowly to 88. Add some aquarium salt. Raised heat speeds the ich's life cycle up. Basically the ich attaches to your fish (the host) and feeds on their body slime coating. Once they have been attached for several days they become enlarged to the point where you can see them. (The little white dots) once they get big they then fall off. (this is when they are seceptible to chemicals other stages chemicals can't kill them) after they fall off they float around in your tank for a little and then attach to your substrate, plants, tank walls. Once they attach to one of those places it begins to grow and multiply until the one ich organism explodes into thousands of them. It then reattaches to a host (your fish) and now looks even worse. So now that u knows this it can take a few weeks to completely rid your tank of ich. At 88 degrees the ich can't multiply and will die (there are a few heat resistant strains but that's unlikely) some of the chemicals to treat ich can completely kill your beneficial bacteria in your filter and cause you to have to cycle your tank all over again that's why I suggest the heat and salt method first hope this helps. If you have any questions just ask.