The M70P pressurised throuput FB unit will cater for heavy stocked ponds up to 7,000 gallons (31,500 litres), - with an ideal final operational flow rate of around 700gph. nThis unit is approx 1000mm high (40") with a 110mm (4") diameter core containing 6kg of silica sand, together with standard 38mm (1.5") pipe manifolds including 2 No ball valves. nThe bottom valve is used to control flow and balancing, with the top valve offering the close down facility to act as a byepass to the FB. The M70P will support up to 100kg (220lb) of fish load.n