What would be best to cover a refugium. Glass, plastic or acrylic. I am feeding my fuge via my overflow and the little bubbles popping at the surface is bugging me. Some of them pop out of the sump.
I get a little splashing from my incoming water to the fuge, so I just stuck a small glass piece over that section of the fuge. As long as you are not blocking the light to the fuge, then it really isn't going to matter what you use.
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