Fully submersible heaters can be installed vertically or horizontally. It’s small footprint makes it easy to conceal behind plants or other décor. Precise temperature range between 65°F and 89°F. （500W： 65°F – 93°F） Sensitive and reliable thermostat maintains uniform temperature. Automatically shut off when the temperature is reached.A must for both fresh and salt water aquariums. SPECIFICATION: Power Length Diameter Length of power cord Recommended Tank Size 25W 7.25″ 0.85″ 2.875 feet 5 to 8 gallon 50W 7.25″ 0.85″ 2.875 feet 10 to 16 gallon 100W 10″ 0.85″ 2.875 feet 20 to 33 gallon 200W 12.5″ 0.85″ 2.9 feet 40 to 66 gallon 300W 13.75″ 0.85″ 2.9 feet 60 to 100 gallon 500W 17.625″ 0.89″ 3.65 feet 100 to 166 gallon Voltage: 110-120V 60Hz INCLUDES: 1 heater Tips for Selecting and Using Aquarium Heaters: A minimum of 3-5 watts per gallon is recommended in keeping your aquarium at optimal temperature level. The use of multiple heaters in larger aquariums can allow even heat distribution. The heater should always operate under water. Please cut off the power and wait for at least 10 minutes before changing water, touching the heater or taking the heater out of water. Please don’t use in the water if the wire or glass tube was damaged
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