This larger EasyClear comes complete with a quick-fit hose adapter (25mm) so you can now run a waterfall (via hose) as well as a fountain from the same unit. It is perfect for patio ponds or situations where installing messy hose and cables can be a problem and suitable for lightly stocked goldfish ponds up to 3,500 litres. NOT SUITABLE FOR KOI PONDS. NOTE: UVC bulb included. In the Hozelock EasyClear range the 3000 & 4500 do not include a T-piece attachment whereas the 6000, 7500 & 9000 do.