The VAYINATO 25W Stainless Steel Aquarium Heater with Protective Cover is a reliable and energy-efficient submersible heater designed to maintain a stable water temperature for freshwater and marine aquariums. Featuring a 304 stainless steel heating tube with a protective safety cover, it offers enhanced durability and helps protect fish, shrimp, and aquatic plants from direct contact with the heating element. The adjustable thermostat allows you to set the desired water temperature for a comfortable aquatic environment. Designed with an explosion-proof stainless steel construction, this heater provides dependable performance for daily aquarium use. The fully submersible design ensures even heat distribution throughout the aquarium, while the included suction cups allow secure mounting inside the tank. For safety, the heater is designed to operate only when fully submerged in water. Ideal for Betta tanks, shrimp tanks, tropical fish, planted aquariums, and marine aquariums, the VAYINATO 25W Stainless Steel Heater delivers safe, consistent heating with long-lasting performance.