Keep your aquarium water at the perfect temperature with the Fluval P50 Submersible Aquarium Heater. This 50W heater is preset to 76-78°F (24-26°C) for effortless, hands-free operation in freshwater and saltwater tanks up to 15 gallons (57L). Its shatterproof polymer housing ensures safety, while the fully submersible, waterproof design allows flexible positioning. An LED indicator light shows when it’s heating, making it easy to monitor. Reliable, durable, and easy to use!