Best Hydor Aquarium Heaters of 2025

The Hydor ETH Heater is an innovative external heater designed for aquariums, ensuring high efficiency and durability. Its protective Ptc film technology prevents overheating, providing you with maximum safety. You can easily position it vertically, and it comes with a special eyelet for secure fixing. With electronic temperature control, you can set the heater between 18° C and 34° C, allowing you to maintain the perfect environment for your aquatic life. Regular cleaning of the heating tube is recommended to keep it free from algae and limestone.

The Hydor THEO Heater is a reliable aquarium and turtle tank heater that is fully submersible. Its anti-thermal shock technology ensures maximum safety, preventing overheating and maintaining a stable temperature for your aquatic pets. You will appreciate the shatterproof glass tube, which adds durability and peace of mind. Additionally, the graduated scale allows you to set and maintain your desired temperature precisely, ensuring a comfortable environment for your turtles or fish.

The Hydor THEO Heater is a fully submersible aquarium and turtle tank heater designed for safety and convenience. Its anti-thermal shock technology ensures that overheating is avoided, providing peace of mind while maintaining your tank’s temperature. You can easily position it either horizontally or vertically, thanks to the included suction cups for secure fixing. The graduated scale allows you to set and maintain your desired temperature precisely, ensuring a comfortable environment for your aquatic pets.

The Hydor 25W Aquarium Heater is designed to provide reliable heating for your aquarium. Its high resistance ensures that it is the first shatter-proof heater on the market, giving you peace of mind. You can position it vertically, horizontally, or completely submerged, allowing for flexible installation options. The graduated scale enables you to maintain a precise temperature, ensuring a comfortable environment for your aquatic pets. Additionally, this heater can withstand running dry without damage, making it a safe choice for your aquarium setup.

The Hydor THEO Heater is a fully submersible aquarium and turtle tank heater that offers excellent safety features. Its anti-thermal shock technology ensures that you can position it either horizontally or vertically without worry. This heater includes a Ptc film that prevents overheating, giving you peace of mind while maintaining your tank's temperature. With a graduated scale, you can easily set and monitor your desired temperature, ensuring a comfortable environment for your aquatic pets.

The Hydor Adjustable Heater ensures precise and safe maintenance of your aquarium's water temperature, creating an optimal environment for your fish. With its long service life, you can rely on this heater for continuous performance, reducing the need for frequent replacements. It features exclusive technology and high-quality components, ensuring both durability and efficiency. This heater is perfect for aquariums ranging from 90 to 150 litres, providing you with the convenience of reliable temperature control without any hassle.

The Hydor Slim Heater is an ideal choice for Betta fish owners with small tanks. This compact device raises the water temperature by a few degrees, ensuring a comfortable environment for your fish. It can be easily submerged in water or placed under gravel, making it versatile for various tank setups. With its plug-and-play design, you won't need to set any temperatures, allowing you to focus on enjoying your aquatic pets without hassle. It's suitable for both fresh and saltwater environments, adding to its convenience.