The Aquascape Container Water Garden Filter provides ideal mechanical and biological filtration for Aquascape Patio Ponds, bird baths, and other container water gardens holding gallons of water. The included filter sponge and activated carbon insert ensure proper filtration, while the magnetically driven motor technology makes the filter extremely energy efficient, quiet, and easy to maintain. The durable pre filter water intake design prevents clogging and reduces pump maintenance, providing years of trouble free operation.