Range: JVP-132 circulation pump for freshwater and saltwater aquariums - Suitable for Malawian aquariums, coral reef aquariums. 360 rotatable bracket and nozzles for stronger wave effect. Simulate the natural ecological environment and disperse the waterways. Suitable for aquariums 1.0-1.5m, 1.5-2m, 230-370L (based on 0.5m width and 0.5m height) Note: In order not to break the aquariums, please dont let the anode and cathode together when you install the magnet. Please install it correctly according to the user manual. Swivel: 360 degree free rotation, multi-piece ceramic bracket, very quiet. Triangular rubber base, stable motor vibration and isolates the collision noise of the case. Stable: The suction cup can prevent the scraping of the aquarium. Just move the suction cup except the fish tank to adjust the position of the pump. The suction power of the suction cup depends on the thickness of the aquarium glass. The maximum thickness should not exceed 15mm. Effective: Quickly clean fish food and droppings from the bottom of the aquarium, reduce water pollution. Strengthen the exchange of microorganisms in the water and keep the aquarium clean.