Aqueon preset aquarium heater 200 watt

Up to 55 Gallons Aqueon Preset Heaters require no adjusting! The preset temperature has been calibrated to 78°, appropriate for most tropical fish. The fully submersible heaters are constructed of shatter-resistant quartz glass and features an automatic safety shut-off to avoid overheating. An LED indicator light displays red when actively heating.• Preset to 78°, accurate to +/- 1°• No adjustment required• Shatter resistant• Auto shut-off• LED light turns on when aquarium water is being heated