Shatterproof quartz glass tube Completely submersible Easy to read adjustable dial Double-sealed durability For fresh or salt water。 Compact size ideal for all aquariums Precision engineered Unique suction bracket firmly holds heater in any location or position Adjustable from 20 ºC to 32 ºC +/- 0.5 C accuracy v
Completely submersible, reliable, dependable and accurate. Water-calibrated to ensure precise temperature selection and superior performance, the heaters deliver the ultimate in direct-set control, compact double-sealed durability and certified accuracy to within one degree. Instead of the typical metal element in a breakable glass tube, these heaters utilize a polymer sheet that uniformly heats a shatterproof glass tube. The temperature is controlled and maintained by a highly precise micro-switch controller. Thermostat reads in both °F (68-89°) and °C (20-32°). The custom Double-Suction Mounting Bracket features an adjustable three-position window that ensures easy-to-view temperature setting. Heaters are suitable for both fresh and salt water