I have a coralife biocube 29 that is cycling now and is going to be a reef tank. All is well, except my temp. During the day its at a steady 82-84F, and at night (without any lights) its around 80! Is this to high for a reef tank? some people say they have had success with opening the feeding door and blowing a fan in it, or putting a fan over the sump with that door open, but I don't want the feeding door to be open because I will have fish that are known to jump, and i don't want the sump open, because it makes the flowing and crashing water sound really noticeable. any Ideas? Thanks.