An inductively coupled plasma (ICP) for spectrometry is sustained in a torch that consists of three concentric tubes, usually made of quartz, although the inner tube (injector) can be sapphire if hydrofluoric acid is being used.n inductively coupled plasma (ICP) for spectrometry is sustained in a torch that consists of three concentric tubes, usually made of quartz, although the inner tube (injector) can be sapphire if hydrofluoric acid is being used.
We recommend the following GPK (gallons per Koi) rates based on their size: Small Koi (2 - 8): 100 - 150 gallons. Medium Koi(8 - 14): 250 - 300 gallons. Large Koi(14 - 24): 400 - 500 gallons. Jumbo Koi(24 - 36): 750 - 900 gallons. The GPK estimates are based on long term housing for the Koi. Indoor winter tanks can be small, but must accommodate enough room for the Koi to swim around comfortably.
But you can have 15-20 Koi in 1000 gallons IF the filter is large enough to handle the waste produced...both solid and ammonia. (Basically a filter designed for a 5-6000 gallon pond) The key to deciding if you are over stocked is water testing.t is more important then the number of gallons. Many store bought filters will tell you they can filter 1000 gallon ponds or 2000 gallon ponds. These ratings are not usually accurate.