This is the 4.25 cu.ft. AquaBead or AlphaONE unit. What a nice size filter. A 4.25 cu. ft. capacity designed to be used on ponds up to10,000 gallons with fish loads up to a whopping 225 lbs. That’s a lot of fish. Easily flows 90 gpm while only having a footprint of 24″ X 35.5″.
The AlphaONE filters were designed to be the most energy efficient filters on the market. Inside is more than double the lateral surface area, where the upper beads gather around the slots in the lateral arms, than that used on any other filter. Couple this with the highest flow multiport valve on the market and you have a filter that was designed to be energy efficient.