Together this quality pump & filter can look after a fish pond of 8, 000 to 9, 500 litres (1, 750-2, 000 gallons). The higher figure needs the addition of an air pump of approx 1, 000lph. Once this filtration system is up an running it requires very little maintenance. The pump has a non-clog impellor that can handles solids up to 8mm while the filter comes equipped with a super 'easy-clean' feature so you can clean the dirty sponges without removing the lid.