Black Overflow CoverSome tanks come with open overflow boxes with no cover, which causes Noisy, gurgling drain lines ruin the peaceful ambience the tank should create. Excessive algae growth can occur (since there's no cleanup crew in the overflow box), which needs to be constantly cleaned and puts your drain pipes in danger of being clogged. Seeing the piping and algae buildup can be a constant eyesore. The Top Lids Black Overflow has been specifically designed to