Aquarium Heater for 30 40 55 75 Gallon Fish Tank, 2 Pack 300W Submersible Fish Tank Heater with External Temperature Controller, LED Display, Over-Temp Protect, Used for Saltwater & Freshwater - EWUGFEIV, Y5-300

• 【Full Submersible Heater】Waterproof protection, full submersible design, suitable for freshwater and saltwater using. The heater should be completely immersed in water during the heating process, Each 300W submersible fish tank heater is suitable for 30 to 55 gallon aquariums. 【Quality Material】Fish tank heater is made of 2mm thick quartz glass, explosion-proof, not easy to crack, very safe for humans and aquatic animals. The black protective shell is a high temperature resistant ABS material that protects the fish and keeps you from getting burned too. 【Adjustable Temperature】Using an external controller can easily adjustable the temperature from 68℉/20°C to 93℉/34°C. Once the desired temperature is reached, fish tank heater automatically maintains a constant heat. Each press will ±1℉. 【Easy to Read Temperature】This fish tank heater has Digital LED temperature display, which can display the real-time water temp and set temp, so that you can know the temperature changes in the fish tank easily. The fish tank heater is also a clear heating indicator on it. 【Safe and Reliable】Aquarium heater with over-temperature protection and water shortage protection functions. The power will be cut off and stop heating automatically if the heater out of water or overheating, ensure a safe and comfortable aquatic environment for your water pet.