The Filtermaster Big Pack Set 2 offers both mechanical & biological filtering for your aquarium. The large surface area of the filters provides an optimal environment for useful bacteria to grow, allowing for even better filtration. Water in an aquarium will always need filtering & in order to keep it crystal clear & rid it of a build-up of harmful substances, having a filtration system is always recommended. The Filtermaster Big Pack 2 ensures clean aquarium water with both mechanical & biological filtering. The filter foam manually filters out larger particles in the water &, compared to other filters, has a large surface area where useful filtering bacteria can settle. The bacteria provide natural water filtration & help remove even the finest suspended particles. Filtermaster has replaced the previous filter 2617080 & is suitable for use with the Eheim Pickup 60 (2008). The shape & texture of the filter is identical to the original products, so you can continue to have finest top quality filtration results for your aquarium. The Filtermaster Big Pack Set 2 contains 12 white filter PPI 30. Filtermaster Big Pack Set 2 at a glance: Filter medium for use with: Eheim Filter Pickup 60 (2008) For efficient mechanical & biological filtration of your aquarium Replaces filter medium 2617080 Identical shape & texture to the original products Contains: 12 x white filters (PPI 30) An ideal culture for useful bacteria growth thanks to the large surface area