You know, I have never really seen a 75 gallon tank. It looks like a very good size. What are the dimensions? I can't wait to see it up and running with whatever you decide on. I have one suggestion. On one of my tanks, I put my heater in one of my back corners. On another tank, I put my heater like yours in the middle of the tank, but about 1 inch off the gravel so it won't be as noticeable. Anyways, remember to post pictures of whatever you decide on. The Doctor.