Ahh, i will have LED's so i doubt i will have a problem with temp spikes. My equipment list will be as followed: 54 HO LED's, protein skimmer rated for 150g, dual brs gfo & carbon reactor (not 100% sure on that one yet), reef octopus bio pellet reactor, 2x maxijet 1200's with mods that will soon be replaced, not sure on a replacement yet, and a my return is a mag 7. Im thinking about rebuilding my tank without actually rebuilding it completely. Just changing some equipment out, upgrading my sump to 30g's, replacing my DT with a new tank as i dont trust the silicone on this one; its flaking off when i clean the glass. with that being said i may not need the apex controller. I showed the lady your thread and told her "thats what im aiming for" she gave me the approval to change some things out so im looking forward to it.