OASE AquaMax Eco Classic 1900 Pond and Waterfall Pump The AquaMax Eco Classic 1900 is the energy-efficient heart of your pond filtration system. Solids-handling pump is encased in a pre-filter pumps pond water and coarse debris particles up to 1/3 in. in size. With its organic design, the AquaMax Eco Classic Pump can be easily integrated into your pond or waterfall design. This pump is capable of creating water displays up to 9.5 ft. AquaMax Eco Classic series has a 20 ft. power cord.