The AquaBeadX2 is designed in such a way that all valves and internals of the filter are double that of a regular filter. At no time does each pump's water pathway get smaller than a 2" opening. Everything is double on this filter so that we maximize the flow potential of each pump. Everything is double on this filter except the price, you'll spend less money on 1 AquaBeadX2 than installing 2 individual filters. The AquaBeadX2 is designed with the same integrity as the AquaBead and AlphaONE filters. Designed to maximize the flow and efficiency of today's modern koi pond pumps. We remain committed to providing the most energy-conscious filtration products in the industry.