Aquarium Heater 500W with External Temperature Controller, Submersible Fish Tank Heater with Large LED Digital Dual Displays, Tank Heater Keep Stable Temp for Tropical Fish Betta Turtle

【Safety Protection Design】 : U-picks thermostatic aquarium heater adopts dual sensors for better protection, when the water temp is higher than the set temp, heater automatically stop heating. When the water temp is lower than the set temp, heater automatically start heating. Stepwise heating, the temperature gradually rises, which can prevent the temperature from changing too quickly to cause the fish to be uncomfortable.
【Thicker Exploson-Proof Quartz Glass 】: Using stable and reliable high-quality materials, 30% thicker than normal aquarium heaters, which is blast-proof. Protective Cover made of high temperature resistant material will not soften with high temperature, it can prevent your loved fish from scalding
【Dual LED Digitale Display】: With dual digital display windows, you can clearly see the water temp and set temp at the same time even in the dark. It is convenience to observe the temp change, higher security. With others' heater, you may need to take out the heater