Aquascape Container Water Garden FilterThe Aquascape Container Water Garden Filter provides ideal mechanical and biological filtration for Aquascape Patio Ponds, birdbaths, and other container water gardens holding up to 50 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