Aquarium Heater for 40-55-75 Gallon, 300W Submersible Fish Tank Water Heater with Accurate Temperature Control, Over-Temp Protect, Auto Shut-Off, Quick Heat up for Saltwater & Freshwater.
Top Fin Submersible Aquarium Heater.This submersible heater presets at 78 degrees and features 50 watts of power as well as automatic shut-off, making it easy to keep your aquarium water at a safe and comfortable temperature for your fish. Only at PetSmart.
For sale is an Aqueon Aquarium Preset Heater. The heaters warms to 78 degrees Farenheit. This 100 Watt heater is marked as ideal for 30 gallon fish tank but can work on tanks up to 40 gallons. It can be used in both freshwater and saltwater aquariums.

Mini submersible aquarium heater is a 25-watt glass heater designed for fish tanks holding 1 to 70 gallons. It maintains water temperature between 68 and 93F to support aquatic life health and stability. This heater fits compact aquarium setups and is ideal for indoor use.
With the EHEIM precision heater your fish receive exactly the right temperature in any aquarium. Obvious ideas often are the best ones. For example, the aquarium heater as a rod.Related Products. 250 Watt Jager TruTemp Submersible Aquarium Heater - Eheim.

FREESEA Aquarium Heater Aquatic Turtle Heater With Intelligent LED Temperature Display For Fish Tank Submersible Heater with External Controller Features FREESEA Digital Smart Aquarium Heater, a compact submersible heater, is for small tanks.