Hi petetong, just put some more photo,s on koivista, hope you enjoy what tou see. Pond is 3000gal gravity fed with filtration at both ends. 2x4inch bottom drains,2x35 what u.v,s, 2 aquamax 6000 pumps, 1 large vortex, 2x4 bays and 1 airtec 65 air pump. Everything runs 24-7 exept the u,v,s they get switch off for winter. Regards Jack.