Fluval 25w Pre-Set Aquarium Heater Filled with pioneering spirit, Fluval is one of the top names in aquarium product and care around the globe. With reliable technology, carefully researched nutrition and more, Fluval has been inspiring fish hobbyists for over 35 years. The Fluval P Series heaters are pre-set to maintain a consistent temperature of 24-26 °C in both fresh and saltwater nano aquariums. The strong, shatterproof polymer construction helps to protect the tank and inhabitants from damage. The simple preset temperate requires no adjustment, and the waterproof, fully submersible design allows for easy positioning inside the aquarium. An LED running lamp illuminates to indicate when product is in use. For use in freshwater and saltwater aquariums Pre-set temperature between 24-26C Powerful motor generates constant pumping power and pressure Shatterproof polymer construction LED running lamp illuminates to show when the product is in use After something different? View all Fish Heating and Lighting. New to fish care? View our guide to Setting Up a Fishtank.