Best Seller | Pro 50 Submersible Aquarium Heater, 50 W / 8.5 IN The Aqueon Pro 50 Submersible Aquarium Heater is a precise temperature control feature that allows you to set the temperature to within +/- 1 degree F. It has an adjustable temperature range between 68-88 degrees F, making it perfect for all types of... ... more Pro 50 Submersible Aquarium Heater, 50 W / 8.5 IN The Aqueon Pro 50 Submersible Aquarium Heater is a precise temperature control feature that allows you to set the temperature to within +/- 1 degree F. It has an adjustable temperature range between 68-88 degrees F, making it perfect for all types of... Petco.com | | $44.95 go to store |