I am still amazed at how hot my JBJ Nano Tank keeps my water. I am talking 84.7 degrees. It just floors me that the pumps run that hot. Thats the only thing that could be heating the water up so much. LED lighting doesnt. So here is my DIY idea. I have taken a Laptop cooler type deal? You place your laptop on them and they have fans on them that suppose to keep your laptop from getting so hot while working. I found a power adapter for it and I have it laying over the water with the 2 little fans blowing into the chambers of the tank. If this works I will take the thing apart and just use the fans only without the whole piece. I was at 84.7 - the little fans have been running about a hour and I am now at 83.9 so hey thats progress. I just need to get the temp. down with the last option of getting a chiller because they are so expensive.