Pond Pressure Filter, 4 Removable Filter Sponges & Cleaning Indicator, 4000 GPH Max Flow Rate 25026898Quality Material: Made of high quality ABS material, which features great insulation function. Excellent Performance: Its maximum flow through is up to 10000 L H, suitable for decorative ponds of 2500 gallons and fish ponds of 1500 gallons. 4 Filter Sponges and Cleaning Indicator: Equipped with 4 filter sponges, which can be removed, washed or replaced, the filter ensures the balance of water flow. Yellow and blue sponge density is different to