AQQA Submersible Aquarium Heater 500W for 55-130 Gallon Fish Tank | Quartz Glass, External Controller, Betta Tank Koi Pond, Saltwater & Freshwater, AQ197-500W

About this item

• Fast Heating with Durable & Safe Design: The aquarium heater is made of explosion-resistant quartz glass and high-temperature resistant nickel-chromium for quick heat transfer and reliable performance in both saltwater and freshwater tanks. Dual sensor probes provide more accurate temperature monitoring, while the PC plastic protective cover prevents direct contact, ensuring your fish stay safe from burns
• Easy Operation with External Controller: The submersible fish tank heater comes with a convenient external controller for easy and precise temperature adjustment. Press the SET button to enter the temperature setting mode, and each press increases the set temperature by 1F/1C within the 59F93F (15C34C) range. Press and hold for 5 seconds to switch between Fahrenheit and Celsius
• Overheating & Dry-Run Protection: The fish tank heater will automatically shut off when the water temp reaches set temp. If the temp rises rapidly 3F/3C higher than set temp, the heater will stop heating immediately and a flashing alert will appear on the controller. When the heating rod is exposed more than 1 inch above water, an E0 error code appears and heating stops. The protection system prevents overheating and dry burn, keeping your fish safe
• Intelligent Automatic Heating: The AQQA aquarium heater adopts automatic thermostatic control. It stops heating when the water reaches the set temperature and automatically restarts when the temperature drops 2C/F below the set point. The memory function retains your settings after a power outage, making it more convenient to unplug the power cord for water changes
• Usage Instructions: Always fully submerge the aquarium heater in water before plugging it in, and ensure proper water circulation in the tank. After turning it off, allow the heater to cool in the water for 1530 minutes to prevent residual heat from damaging the cover. Following these safety tips helps extend the lifespan of your fish heater
• Versatile Tank Compatibility: This 500W submersible heater is designed to efficiently heat aquariums ranging from 55 to 130 gallons, making it suitable for various setups including betta tanks, koi ponds, and both saltwater and freshwater environments

Overview

• Package Dimensions ‏: ‎ 14.13 x 7.95 x 2.56 inches; 2.73 pounds
• Item model number ‏: ‎ GUS-AQ197-500W-US
• Date First Available ‏: ‎ August 16, 2025
• Manufacturer ‏: ‎ AQQA
• ASIN ‏: ‎ B0FL252P3C
• Best Sellers Rank: #83,969 in Pet Supplies (See Top 100 in Pet Supplies) #152 in Aquarium Heaters
• Customer Reviews: 4.7 4.7 out of 5 stars (27)