KKYG Aquarium Heater - 300W/500W Submersible Fish Tank Heater with LED Digital Temperature Display, Adjustable Thermostat & Easy-Clean Removable Housing for Freshwater/Saltwater Tanks - Perfect for Tropical Fish, Betta, Goldfish & Marine Aquariums

When winter comes, many fishes and turtles need a warm environment to spend the winter safely. In order to give your cute fish a warm and safe living environment, we design this high security heater. Notices 1, Before powering, make sure the heater is completely submerged in the water. 2, Before removing the heater out from the water, make sure the heater is unplugged to avoid dry heating. 3, Please NOT put the aquarium heater into the sand as this will cause INACCURATE heating. Size: A-50W-20CM,A-100W-20CM,A-200W-20CM,B-300W-23.5CM B-500W-23.5CM,B-800W-23.5CM,B-1000W-27.5CM,B-1200W-27.5CM Temperature control range: 20 ° C - 34 ° C Package contains ·1 x heater with 2 x suction cup Precautions: Delivery Time 15-25 days.Please contact us if you cannot receive the order after 30 days. If you have any questions, you can get in touch with us by email, we will give you a satisfactory answer within 24 hours; We have a variety of styles of Aquarium Heater. If you have time, welcome to our shop to buy, we will do our best to serve you.

Dual temperature sensing equipment: Prevents the damage of a single probe and causes the water temperature to be monitored without heating and over temperature. The double probe is more reliable.

Over-temperature protection: When the water temperature exceeds 36°, the EE fault is displayed and stops working. When the water temperature drops to 34°, the heating rod is re-operated to the set temperature.

Intelligent frequency conversion: PID heating rod saves about half of electricity compared with ordinary heating rod.

Dual relay circuit: Two relay chips work to prevent over temperature faults caused by single relay failure.

Removable housing: The use of a long time will accumulate dirt, affecting heating and safety, so the detachable design is particularly important.