I'm starting a small cycle on a 2G tank. I threw in a mystery snail and some algae wafers to speed up the process. The tank I bought came with a filter, but not a heater, so I bought a ZooMed non-adjustable one. It said it would only raise it a couple of degrees and then shut itself off....but the tank water is 85*F. I'll check again later, but should I be worried? I don't have any fish in it yet, but I don't want to use this heater if I'm going to have baked fish.