| Brian et al:
In Jan of this year, we had our water tested as a requirement before purchasing an All Clear Water Purifier... One on the tests was for KH hardness... The water from our tap and in the pond is a constant 3 dh... Ann Telford recommended that we increase this to 5.5 dh as she felt that a KH of 3dh would be detrimental to the koi's health over the long term...
Hope this clears the confusion...Aloha! Mike |