🐟🐟 Coupon Code: Pins15OFF(15% Off) 🐟🐟 Hygger HG-943 aquarium submersible heater effectively maintains the tank water in the constant temp you set, stops heating when the water temp reaches the set temp and restart heating when the water temp is 1°F to 2°F below the set temp. 🐟 Automatically stop and restart; With built-in thermometer; Durable quartz glass; Explosion-proof & shatter-resistant; With 2 strong removable suction cups; Quartz sands with good thermal conductivity