Aquarex 200W Aquarium Heater

The Aquarex 200W Aquarium Heater (specifically from the GH / hi-protection series) is an automatic, fully submersible thermostat heater designed for both freshwater and saltwater fish tanks. It is typically optimized for aquariums with a capacity of up to 200 liters (approx. 53 gallons).

Key Specifications & Features

Heating Element: Built using durable quartz glass tube construction, providing strong thermal resistance and structural explosion protection.
Safety Guard: Equipped with an external protective sleeve/cover to prevent large fish, turtles, or sensitive bottom-dwellers (like rays or catfish) from suffering "heater burn".
Thermostat Control: Includes a precise automatic constant-temperature core that prevents the water from overheating or "cooking" your fish.
Insulation: Features heavy double insulation and an entirely waterproof design for safe, prolonged submersion.
Versatility: Works identically well in both marine (saltwater) and freshwater configurations.

Best Practices for Aquarium Use

Placement: For the most accurate temperature readings, mount the heater near an area with strong water circulation (such as near a filter output) to evenly distribute heat throughout the tank.
Safety Drip Loop: Always arrange your power cable with a drip loop below the outlet level to prevent stray water droplets from running straight down the cord into the electrical socket.
Maintenance Protocol: When performing tank cleanings or water changes, turn the heater off and let it cool down in the water for 15 to 20 minutes before removing it or dropping the water line below the heating element. Exposing a hot quartz tube directly to cool air can crack the glass.