Aquarium Covers - time for a dumb question
After some time away I finally am getting back to putting my set-up together. I am looking at lighting and it all says to be installed on a tank with a cover. I have a 90g oceanic tech tank. Is a cover just a sheet of glass? acrylic? Is it really necessary? Get one at the LFS? Online?
Thanks - and sorry for such a dumb question.
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