Cobalt Neo-Glass Submersible Aquarium Heater Enjoy safe reliable and consistent tank temps with the Cobalt Aquatics Neo-Glass Submersible Aquarium Heater. This fully-submersible heater is made with a borosilicate glass tube for heat and shock resistance plus a solid ceramic radiator for even heat distribution. It also boasts a 0.7 degree accuracy. The heater is easy to set up - simply install with the included mounting bracket set the desired temperature using push buttons then check out your tank temperature on the digital display. Specifications Wattage: 25W - SKU: PLFD40667