- 10W fish tank heater with a built-in thermometer for accurate water temperature readings and easy monitoring. - USB powered for convenient use. Easily connected to a USB power source, suitable for various aquariums including fish tanks and turtle tanks. - Submersible design allows placement directly in the water for efficient heat transfer and even warming of the water. - External temperature controller enables precise adjustment of the water temperature, creating a stable and suitable environment for fish and turtles. - Ideal for maintaining the proper water temperature in aquariums, supporting the health and wellbeing of aquatic pets. - Use scenario 1: Maintain tropical or temperature-sensitive conditions in a small freshwater or nano tank, ensuring stable readings and reliable heating. - Use scenario 2: Add to a turtle tank to keep water warm, promoting comfortable metabolism and activity levels for aquatic reptiles. - Use scenario 3: Place in a quarantine or hospital tank to quickly stabilize temperature for new or recovering fish, reducing stress and supporting recovery.