The Eheim ThermoControl 25 is a compact, high-precision aquarium heater designed for consistent water temperature in small tanks. With an adjustable range from 18°C to 34°C, it ensures a stable and healthy environment for tropical fish, shrimp, and aquatic plants.

Equipped with thermo safety control, it automatically switches off when exposed to air, preventing overheating and damage. Its shock-resistant quartz glass construction guarantees durability, while the slim, fully submersible design fits easily into aquariums up to 25 litres.

Key Features

• 25W heater – ideal for aquariums up to 25 L
• Adjustable temperature range: 18–34°C
• Thermo safety control prevents overheating
• Fully submersible with waterproof sealing
• Shock-resistant quartz glass for durability
• Easy-to-read temperature scale
• Suitable for freshwater & marine tanks
• Made in Germany with a 3-year warranty

Specifications

• Power: 25W
• Aquarium Size: Up to 25 L
• Temperature Range: 18–34°C
• Length: 22 cm
• Material: Quartz glass
• Suitable for: Freshwater & Saltwater

Usage
Ideal for nano aquariums, betta tanks, and shrimp setups, the Eheim ThermoControl 25 keeps water temperature stable, reducing stress and improving fish health.