So for the first few weeks my temp was steady between 77-78, but recently it had been hitting 80 at night! I didn't know why but I didn't think much of it and just upgraded to a 4 bulb t5 with my other 2 bulb hanging on the back of the tank. Now I can't even get my temp below 84, and I'm starting to panic because a green cup coral looks bleachy. I tried a fan in top, wasn't much change. How do u guys do it???