I was into coral reef tanks for quite a while. Talk about a money pit, makes vaping the equivalent of grabbing a roll of Mentos when you reach the register. One thing corals need is lots of very bright light in the proper spectrum to simulate sunlight at 20-30 ft under water.
I had a friend I made through the hobby who built an 800 gallon tank in his home. Needed a structural engineer to make sure the floor could hold it (about 9 pounds per gallon with all the salt added, plus all the sand rocks/reefs, corals, and the supporting filtering and circulating pumps). Needless to say, he needed a few kW (for real, I think it was about 3,000-3,500 W of lighting) of metal halide lighting to keep the corals growing (plus the pumps and filters and all).
Cops got a tip about these really, really bright lights seen by a busybody glowing through the window. The cops somehow check the house's electrical consumption and see it's way above normal. They return with a warrant to search on the assumption they were grow lights for an indoor weed farm. They left feeling very embarrassed, and probably a little annoyed they had to listen to a 45 minute lecture from my friend on how the whole thing worked