SuperFish ECO Heater SuperFish ECO Heater – The Eco Heater 50 and 100 – designed for small aquariums. Heater 50 is only 17 cm long and fits perfectly in the filter chamber of the Home 8, 15 and 25 and other mini aquariums. The Heater 100 is 21 cm making it ideal for the Home 40, 60 and other aquariums up to 70 litre. The Eco Heaters also have a reliable thermostat and extra-long cable. Wattage available: 50 Watt 100 Watt 200 Watt 300 Watt Tropical fish live in water with tropical temperatures. With a submersible aquarium heater you can then heat the aquarium water to the right temperature. Superfish surely makes your aquarium hobby successful, complete with aquariums, filters and filter media, heating, lighting, ventilation and useful accessories. It is our goal to make your aquarium hobby successful and also affordable. Click here to also browse a wide range of Superfish products we stock!