The OASE HeatUp line of aquarium heaters are designed for marine and freshwater tanks. For optimal heating, utilize the HeatUp 200 to create uniform temperature levels for your aquarium environment. The control system on the heater allows accurate readjustment of the temperature (+/- 6°F) and can be adjusted using the included post calibration tool. The temperature scale can be adjusted between 66°F – 90°F. The HeatUp is perfect for submerged use and includes a thermal shutoff switch for added protection. The heating function is displayed via the activated control light. Temperature levels are monitored and controlled by bi-metal technology for automated heating. The quartz glass tube provides additional safety for aquarium use. Integrate this heater into the BioPlus 200, FiltoSmart 200, BioMaster 350 to combine filtration and heating into one location for more undisrupted beauty in your aquarium. Utilize the ThermoFit FiltoSmart 200 (model number 48532) to secure the heater to the FiltoSmart 200 filter. The included holder with suction cups can be used to install the heater to the side of the aquarium. This heater is protected with an included 3 year warranty.