Thanks for that suggestion. That Aqua Medic interested for the looks, and the price.
How many lamps does your Catalina have, and can you switch them independently? I understand that the Aqua Medic just has one switch, so you can only choose between both lamps on or both lamps off. I might just consider rigging together two hydroponics strip lights for this setup because that way I can better control light. Depending upon my plant selection I might just make this a low-light setup, so that the plants will grow more slowly and also to limit algae.