Biocube vs Reefcasa Laguna

[Zymotic]

You can make your own lid with a sheet of polycarbonate cut to size. Just drill some holes about every 3/4ths an inch for gas exchange and place a couple aquarium lip clips. For a ReefCasa tank it probably wouldn't cost more than $25.00usd to make your own lid.

Basically, something like this, only instead of using glass you use polycarbonate (not acrylic because it will warp) and drill a pattern of holes to make it look nice and for gas exchange.