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9. Tips for choosing and using a tapwater purifier for fishponds

  • Ask local Koi dealers (who are on the same water supply as you) how they test and treat their water.
  • Get a drinking water report from your water company or council. Tell them you're a fish keeper so they give you the right information.
  • Find a laboratory (ask your Koi dealer or look in the Yellow Pages) that can test water for fish toxins at the appropriate sensitivity levels.
  • Along with your reports, note your pond's volume, fish stock and health problems before talking to manufacturers.
  • Check that the water purifier can cope with the levels of contaminants in your water supply.
  • Establish the effective life of the cartridge in relation to the typical levels of contaminants in your tap water.
  • Establish the life of the cartridge in terms of water volume, and install a water meter to log the cumulative total through the purifier.

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