My DW and I are building a home and I would like to incorporate a 10,000 US gallon raised formal koi pond in the backyard. This pond will be used to raise 10-12 jumbo gosanke for my own personal enjoyment. This pond that will be a reflection of all the things I have learned from all of you and others I have met on my journey through this hobby.
I am in the process of drawing up my pond design. In the meantime, below are the goals and pond description. Please note that I am still very early in my planning phase and that things will continue to change.
Goal: To build a low-maintenance koi pond to raise 10-12 jumbo gosanke
Total Volume: 10,000 US gallons, 1/4th to 1/3rd of which will be filtration volume
Pond Design: Totorri Onishi 'River' linear streamflow design with water entering from shallow end of pond and exiting at deep end
Dimensions: 9' wide x 24-26' long x 3' deep at shallow end tapering down to 6' at deep end
Longthrow Chamber: 4' wide x 4' deep x 24-26' - 1 mechanical bay, 2 bays of Jmat cartridges, 2 bays of fluidized K1/biochips
Raised Height: 2'6" raised from patio floor to top of pond
Glass Window: 2' x 6' glass viewing window along length of pond next to patio so I can see koi from kitchen nook
TOR: 15-30 minutes....equates to 2-4 x per hours
# Filtration Circuits: 3
Filtration Circuit #1: Two 4" ABD's gravity feed one Aqua Forte Ultrasieve III pumped by one ES8500 to one set of feather rock showers
Filtration Circuit #2: Two 4" non-aerated BD's gravity feed one Aqua Forte Ultrasieve III pumped by one ES 8500 to one set of feather rock showers
Filtration Circuit #3: Four 12" wide pool skimmers gravity feed to mechanical chamber of longthrow filtration bay that will gravity flow through two bays of Jmat cartridges and two bays of fluidized K1 kaldnes/biochips that will be pumped back to shallow end via either (1) air lifts (2) axial pond pump or (3) standard pump that will feed three sand and gravel filters that will return via 18" wide weir waterfall. This long-throw filtration chamber will be designed in such a way so that it can handle flow of up to 25,000 gph.
Shell Material: gunite w/ Xypex mixed in gunite and applied to interior of pond after gunite has dried
Aeration: two aerated 4" BD's, one aeration hose spanding the width of the deep end, two aerated fluidized beds, 18" weir waterfall and two sets of feather rock showers.
KISS Principle: Keep It Simple Stoopid.......filtration bays and showers will be adjacent to pond. Utilize low pressure pumps with low power consumption and/or airlifts and/or axial pumps to move water.
Pond Must Haves: UV light, natural gas pool heater, removable winter pond cover