Fish R Fun Tropical Aquarium Heaters Fish R Fun Tropical Aquarium Heaters – Fully submersible heaters feature a scale that allows you to carefully adjust the temperature of your tank and include suction cup attachments to keep it fixed to the side of your tank. The high quality element in these heaters will ensure that you can keep your fish at the perfect temperature for as long as possible. Temperature setting scale, on/off indicator, suction cups attachment and a high quality heating element. 1 year warranty. Wattage available: 25w 50w 100w 150w 200w 300w Click here to view a range of Aquarium Heaters!