Tops or No Tops?

[danny zubot]

I voted topless. I had a glass top crack once due to heat from my halides. While this is not the norm, in my case the lights may have been too close to the glass, and it eventually gave way. All of the other reasons listed above are very valid.

[no_bs]

I go topless on the main, tops on the sump and frag tanks. After putting tops on thoes tanks, evaporation was almost cut in half. Wish there was one more option.

[ponokareefer]

I have a top, but it fits overtop of my lights, and is a fabric with a lot of really small holes that I have stapled to my "open" canopy. It keeps fish in, but still provides air flow. Aquarium Illusions makes the "open" canopy, you just have to find the fabric to staple to it.