Cascade Koi & Aquatics stock many Aqua One products. The Aqua One Aquarium Heater Protector is designed to safely protect your glass heater and aquatic inhabitants within your aquarium. The Aquarium Heater Protector provides a protective barrier for your aquarium glass heater to avoid damage from aggressive fish, tank decor and the heater coming into direct contact with the aquarium glass. It will also minimise the chance of injuries to your aquatic pets from accidental contact with the heater. This Heater Protector can fit most heaters, up to a maximum of 300w with a diameter of 2.4cm and length of 17-36cm.