The Hood

An essential item for any aquarium is a hood or cover. This important piece of equipment performs a variety of functions. First, it prevents unwanted items from entering the tank and injuring the fish. Second, it prevents overzealous fish from jumping out of the tank. Remember, a fish cannot breathe air, and nothing is worse than finding your pet on the floor next to the aquarium in the morning. The cover also prevents water from splashing the walls and floor, causing damage, and it slows the rate of water evaporation from the tank. Water condenses on the cover and re-enters the tank instead of evaporating; this reduces the necessity of adding more water. Fifth, the hood helps the aquarium retain heat. And finally, the hood keeps water from damaging the aquarium light and prevents a potentially dangerous electrical problem.

The hood is generally fitted to the dimensions of the tank and is adjustable to allow for aquarium accessories. It should be composed of thick (1⁄8-inch) glass or plastic so it can support the weight of other aquarium components if necessary. It should be segmented so the entire assembly need not be removed to feed the fish or work in the tank.

For the beginner, I strongly recommend the type of hood that also contains the aquarium light. These units are self-contained and are designed to keep water from the lighting unit, minimize danger, and cover the entire tank. If possible, the tank, stand, and hood should be purchased as a package from a single manufacturer. This prevents the problem of mismatched aquarium components, and may also be less expensive.