🐠 hygger Variable Frequency Aquarium Heater: 200W/300W/500W Quartz Fish Tank Heater with LED Digital Display Thermostat Controller Review

🐠【Rapid Heating & Safer】The double heating rods are made of explosion-proof quartz glass, which is anti-corrosion, non-leakage, and non-conductive, making the water heating faster, more stable and safer. 4 suction cups make firmly installed and the ABS protective shell to ensure the safety of water pets. 🐠【Auto Power Off & Abnormal Alarm】This fully submersible aquarium heater has Intelligent dual temperature probe and memory function. It will automatically stop heating and emit a warning signal when the heating rod is out of the water or over temperature, and resum work when the heater rod is completely immersed in water or cools down. 🐠【Variable Frequency Energy Saving】Intelligent variable frequency design to reduce power consumption. High-power rapid heating, low-power to maintain water temperature. When the water temperature is 1°F lower than the desired temperature, it will automatically enter 50% power heating, saving electricity and energy. 🐠【Precise Temperature Control】Temperature can be precisely adjusted from 54°F to 90°F, press the "SET" button one time can change 1°F or rotate the "SET" button one time can changge 0.5°F. Accurate temperature measurement and high-definition LED digital display (display accurately to 0.1°F) make the temperature difference small and the fish healthier. 🐠【Wide Compatibility】This 300W aquarium heater is suitable for 30-60 gallon freshwater and saltwater tank. Please note unplug the heater and wait for 15min before changing water or removing heater. Make sure the heating rod is completely submerged in water and there is enough water flow and water circulation in fish tank when using the heater.