DIY Eggcrate Aquarium Cover
Many tanks comes with standard tops or glass tops. However, if your aquarium doesn't already have a cover (or if you'd like to switch to a new type of tank top), here's a simple DIY project for you.
I had a glass cover on my aquarium for a while. It worked fine except that in the summer, the glass top trapped all of the heat inside my aquarium, making it too hot for my livestock. An eggcrate top is a simple solution. Since eggcrate has holes, it keeps the tank cool, yet the holes are small enough to keep most jumpers inside the aquarium. Eggcrate also allows for better gas exchange between the water in your aquarium and the air; this helps maintain appropriate levels of dissolved oxygen in your aquarium and keep pH more constant.Materials
1. Piece of Eggcrate - this can be found at such places as Home Depot, Lowe's, ACE, or online. Ask for light diffuser used in ceiling and lighting installation, and someone should be able to point you in the right direction.
2. Pair of Cutters - You'll need these to cut the eggcrate to dimensions that fit your aquarium, as well as for cutting out slots for any equipment that you might be running on the tank (e.g. HOB filters, overflows, etc.).