I was able to pick up a used 29 biocube upgrade on ebay. I have it running but can anyone here tell me about the fan? Does it run all the time or does it kick on and off? So far when I turn it on the fan isnt running. I havent installed it yet so maybe it kicks on after awhile. I have the bluefish mini 2.0 controller. Its a pain to set up but seems to work