"RichToyBox" wrote in message
news:AgyUa.133952$OZ2.26027@rwcrnsc54...

A swimming pool filter system is designed for chlorinated water and
minimum
debris, so it is greatly undersized for a koi pond. Look at the
modifications to the filter system.

I think I will sell the sand filter and build a more appropriate filter.

... Most of the plumbing will work as
currently installed,

I wonder if the koi would get along with my Polaris pool-vac "robot"

Chris