Manufacturer ‏ : ‎ HiTauing. Manufacturer: HiTauing. Aquarium Heater 300W– The 300 watt aquarium heater produces stable power with quick heat up. Aquarium heater for 40 to 75 gallons, ideal uses for the marine saltwater and freshwater, fish tanks, turtle tanks, betta tanks, small ponds, and so much more.