I am upgrading my tank after 7 weeks. Out of room! 40 corals and my rock stack doesn't provide much room around the sides to place corals especially near the bottom and I just want a bigger tank! So I'm from a 15 Gallon Colum tank to a 24 gallon JBJ nano. I currently run a Cobalt Neotherm 75watt heater. Should I upgrade to the 100 watt? I keep it in my small hang on back refugium in the entry chamber (first chamber). I just got it a week ago so I could return it (Amazon) for free and upgrade to the 100 watt for an extra dollar. If it's not necessary though please let know. It will fit in the fuge still but it will take up from almost the bottom to the top of the water line as it's 3" longer than the 75 watt. Opinions please....