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[365seasons]

eggcrate is what i got on all my tanks
works great
you could look at Rona,Home Depot,i get mine at Totem (http://www.totem.ca/product.aspx)
hope that helps
Andrew

[fragNplug]

I used plastic screen for like the screen door on your house.
I placed it over my lights and cut pieces on the back to fit around my wires and pipes and used those big paper clips to help weight down the front.

[Binare]

You can buy window screen making kits for cheap. Then you get a trim around the screen custom made for your trim.