It is easy to forget in pondkeeping that you don\'t necessarily have to buy a bigger and bigger filter to match bigger project as you can instead just run two filters off one pump. All you need to add to this set is a Y-piece to divert the flow from the pump equally to serve the two filters. As a result result you will have an excellent pond filtration system that is suitable to manage a fish pond up to 20,000 litres. This set contains the following components (please click links below for more information): • PondXpert FreeFlow 13000 pond pump • 2 x Laguna Pressure-Flo 10000 pressure filters * Saving made when compared to buying items separately.