Kessil, AI, Radions, nanobox. With a big tank like that a hybrid led/t5 would get better coverage and is a sure bet for success. I really want the aquatic life t5 hybrid that has a mounting system for most of the aforementioned LEDs, sending an ATI T5 fixture to nanobox and having it retrofitted with LEDs would be a dream too. At any rate it’s going to be a big expense