I used to have an open top 90 gallon fresh with metal halides. I went to a closed top after 6 or 7 of my rainbows jumped out. One of them made it clear across a 15 foot family room before I found him under the couch.
Excellent idea! I wonder what type of paint one could use to paint them black? White panels might not look good... (?)Originally posted by Moreta
In the past I've had metal halides on my reef tanks and used "eggcrate" as a cover to maximize the light and keep the heat down to a minimum. That's the plastic panels with an "open squares" that are used to cover up ceiling light fixtures. It cuts down on fish jumping out, depending on the size of the openings. They can be cut to fit your tank and are pretty cheap at Home Depot or other home improvement stores.
HTH
Tracy