BinaryTerror - You need to FIX your Heater position still.
I just now watched the video and it's in danger of going belly up based on it's location. Lay it sideways to you keep the entire thing underwater. You are like 4 inches out of the water. In order to be at the "Correct" level your SUMP would need to be filled to the top and about 1/4 inch higher.
Based on the tank layout I'd position on the side of the 10gal sump at an angle.
75gal Salt, 18gal Sump, Skimmer, 60lb Live Rock, 90lb Live Sand, 3 Pwrhd, 2x55w Actinic, 2x55w 10k. Guest list: Goby Green Clown, Percula Clown and entire clean up crew.