covering the tank

[DJ88]

Why?

You'll get massive salt collection/water condensation on it and it will block your lights. Cleaning once a week at least. If not more. Possibly crack/melt if you decide to run MH's. They throw off a LOT of heat. You'll have troubles cooling the tank as the only area open to air for heat exchange will be the sump. Glass/acrylic acts as an insulator. Your tank temp would shoot through the roof. Fans in your hood would do nothing.