Bdonaldson
Aquarium Advice Addict
You could uses plastic eggcrate (light diffuser) which is cheap, but some smaller fish can still jump though. This is what I used for years. There are also DIY screen covers that I think BRS has kits for that don't affect the lighting at all and look really nice if done correctly. This is probably the best choice, though I didn't notice much light loss with the eggcrate. Ever since I started up my 40, I haven't had anything over the top. That's why I don't have a wrasse.
I've just always had glass covers on all my tanks. (Freshwater and saltwater) I really do like the look of not having a cover but I was always afraid of loosing to much water due to evaporation and fish jumping. I have a screen kit that I bought from Lowes but haven't done anything with it yet. I may try the egg crate and see how that works out before doing a screen cover.
I really love my light. It has shimmering effects that you can see on the rocks and across the bottom of the tank. It really looks like the shallow parts of the ocean with the light dancing on the rocks and bottom.
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