MY friend ( a professional Photographer)was kind enough to take these of my pond recently.The Pond has two basins with about 7000 gal. with a 7 ft waterfall running aprox 8000 GPH for 12 hr. a day. It holds aprox 18, 16-22 in Koi and 25, 6-8 in koi and supports numerous lillies and marginal plants.The pond is constructed of synthetic rock with 2 hidden skimmers and a bottom drain feeding a bead filter and UV sterilizer.First set up in may of 06. It's been trouble free and wonderful.