Because fish do actually sleep， keep your aquarium running smoothly with the Zoo Med AquaSun Aquarium Controller Timer & Power Strip. This 24-hour programmable lighting timer automatically turns your aquarium lamps on and off for you， providing a natural day and night cycle for your fish. It also doubles as a power strip， with four timer controlled outlets and four continuous power outlets. The grounded 3-prong receptacle is also perfectly safe to use for home aquariums. Setting it up is easy―just move the analog dial to your desired times in the morning and night， and let your fish enjoy a light to dark cycle that’s close to their natural environment.