Add to cart AquaBead 2.5 (up to 5000 gallons) $2,199.95 The 2.50cu.ft. AquaBead 2.50 is the perfect filter for ponds up to 5000 gal. and fish loads up to 125 lbs. Flow rated at up to 70 gpm for bio-mechanical filtration. 21″ X 32″ allows you to hide this unit anywhere. Every option is standard equipment. The perfect filter for the majority of ponds.