The Tetra® HT Submersible Heater is designed to ensure the comfort of your aquatic fish, featuring an electronic thermostat that automatically maintains a consistent water temperature of 78 degrees and prevents overheating, thereby extending the heater's lifespan. An indicator light provides visual cues, turning red when the water is heating and green when the desired temperature is reached.

Inside the heater, silicon carbide crystals improve heat distribution and transfer, while the strong glass tube is heat and shock resistant. This submersible heater is easy to use, simply attach it to the inside of the aquarium wall using the included suction cup in an area with good water circulation.

The Tetra HT Submersible Heater is available in different wattages to accommodate various aquarium sizes: the 50-watt HT10 for 2 to 10 gallon aquariums, the 100-watt HT30 for 10 to 30 gallons, the 150-watt HT40 for 30 to 40 gallons, and the 200-watt HT55 for 40 to 55 gallons. This heater is UL Listed, ensuring safety and reliability.

Since 1951, Tetra has been a trusted brand in the world of fishkeeping, providing a comprehensive body of fish food knowledge and offering a wide range of products and solutions to enhance the ease and beauty of home aquariums. Whether you're an experienced hobbyist or just starting out, Tetra has everything you need, from quality fish food and innovative equipment to test kits and decor.

All Tetra HT heaters feature indicator lights to let you know when the heater is on, with a red light indicating heating and a green light signaling that the proper temperature has been reached. Additionally, these heaters are designed to shut off automatically if an electrical short is detected, ensuring your safety.

The HT10 model, specifically designed for aquariums between 2 to 10 gallons with hoods or glass canopies, uses a built-in electronic thermostat to automatically maintain the ideal water temperature of 78°F for most tropical fish, eliminating the need for manual adjustments.

The Tetra HT Heater's small footprint and submersible design make it easy to conceal behind plants or other decor, ensuring a seamless and aesthetic integration into your aquarium. However, it is important to read all label information upon delivery and refrain from plugging the heater into an electrical outlet until it is placed inside the aquarium.

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