Fluval P Series Submersible Aquarium Fish Tank Heaters\nDesigned for both fresh and saltwater aquariums up to 25L, the all-new Fluval P Series Aquarium Heaters feature a fully submersible, waterproof design for easy positioning inside the tank. Made with an ultra strong, safe shatterproof polymer construction, the durable polymer casing surrounds the heater, protecting it and tank inhabitants from damage. The Fluval P10 and P25 Pre Set Heaters require no adjustment as the heaters are pre-set to maintain an aquarium water temperature of 24-26\u00B0C. The P Series Heaters also feature a convenient LED running lamp which illuminates to indicate when in use and 2 suction cups to keep the heater secured in place. P Series Submersible Aquarium Heaters Technical Specifications: - Fluval P10 Pre Set Heater 10w - Suitable for up to 10L (13.5 x 2 x 1.5cm)- Fluval P25 Pre Set Heater 25w - Suitable for up to 25L (15 x 3 x 1.75cm)\n\nFluval P Series Submersible Aquarium Fish Tank Heaters\n\nDesigy