Jebo Aquarium Fish Tank Automatic Heaters 100w 40gal
This aquarium heaters is submersible. Aquarium heater is a must have for tropical fishes and corals. Temperature fluctuations cause stress in your corals and fish, and the fluctuations often go unnoticed by the aquarist. A good quality heater is a requirement in keeping Happy Fish, Healthy Aquarium! A minimum of 3-5 Watts per gallon is recommended for keeping your aquarium at optimal temperatures. Aquarists with larger tanks should use more than one heater. The use of multiple heaters offers the advantage of maintaining heating capacity in the unlikely event that your heater has a problem.