Intex pool pump filter ball cartridge

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This is a filter ball cartridge to put inside an Intex Krystal Clear Cartridge Filter pump (900 L/h) to optimize the water flow and filter efficiency. It requires 20 washable filter balls with a diameter of 4-5 cm (dry). The cartridge arranges filter balls and directs the water flow to provide a much larger filter surface resulting in improved pump flow and filter efficiency. --- We have a 5 m3 liter intex pool with an Intex Krystal Clear Cartridge Filter pump (900 L/h). Because I don't like to buy a new filter cartridge every week I bought some filter balls, which can be cleaned in the washing maschine. Unfortunately the pump's design is ill suited for filter balls: the water flow passes only a few filter balls which get clogged quickly. So the filter efficiency is poor. Therefore I designed this cartridge: the water flows around the cartridge through all balls simultaneously to the center where it travels through the pump itself back to the pool.