About This

• 🐟Aquarium Heater for 40–75 Gallon Tanks：Powerful 300w aquarium heater designed for medium to large freshwater and saltwater aquariums, reef tanks, and fish ponds. Ideal for maintaining optimal temperature in 40–75 gallon systems.. Heater length: 6.9 inches, power cord: 5.34 feet.
• 🐟Intelligent Error Code Display for Safety：Aquarium heater LED screen shows real-time alerts: E1 = heater is out of water (auto power-off), E2 = sensor open circuit, E3 = water temperature exceeds 95°F (35°C). These smart diagnostics help you respond quickly and protect your aquatic life.
• 🐟External Digital LED Controller with Clear Display；75 gallon tank aquarium heater external digital controller displays real-time water temperature in °F or °C (68–93°F / 20–34°C) via bright red LED digits. Mount it on the tank edge using the included bracket—adjust temperature without getting your hands wet.
• 🐟Energy-Efficient & Rapid Heating Design:Featuring a thickened explosion-proof quartz glass tube and high-efficiency nickel-chromium heating element with silicon carbide conduction, this heater warms water quickly and operates energy-efficiently, maintaining consistent temperature even after 72 hours of continuous use.
• 🐟12-Month Warranty & Safe Use: Includes 2 strong suction cups and mounting bracket for secure installation on tank walls. Install vertically in fish tanks, horizontally in turtle tanks. Do not bury in substrate. Press and hold button 3 seconds to switch between °F/°C.Backed by a 12-month worry-free warranty.