Submersible Adjustable Aquarium Heater 25-300w, Fish Tank Thermostat 110-220v. Transform Your Aquarium into a Thriving Habitat with This High-performance Heater, Expertly Engineered for Precise Temperature Control Across a Range of Tank Sizes. With Power Options from 25W to 300W, It Ensures Seamless Adjustments Between 20°C and 34°C, Providing the Perfect Conditions for Your Aquatic Life. Crafted with High-temperature-resistant, Explosion-proof Quartz Glass, This Heater Ensures Both Safety and Durability. It Includes a Sensitive Temperature Regulator and Over-temperature Protection to Maintain a Stable Environment. Its Fully Submersible Design, Complemented by Double Waterproof Protection, Promises Consistent and Reliable Performance. Installation is Hassle-free with a Sturdy Support Hook and Suction Cup, Making This Heater Ideal for Both Freshwater and Marine Aquariums. With a Maximum Immersion Depth of Up to 120CM, It Fits Smoothly into Any Setup. Key Features: - Power Options: 25W to 300W - Adjustable Temperature: 20°C to 34°C - High-Temperature-Resistant Quartz Glass - Explosion-Proof Design - Sensitive Temperature Regulator and Over-Temperature Protection - Fully Submersible with Double Waterproof Protection - Suitable for Freshwater and Marine Environments - Maximum Immersion Depth: 120CM - Voltage: 220V-240V, Frequency: 50HZ-60HZ Ensure Your Aquarium Inhabitants Thrive with This Reliable Heating Solution..