Landscaping for around pond
I have a highly unusual landscaping need in Southern Cal (Hollywood Hills). It involves water coming down from the top of a tunnel, that falls into a small pond, goes under a moat and into a larger pond, with multiple waterfalls feeding into the large pond. Does anyone happen to know a landscaper who might be able to deal with this, and who has at least minimal familiarity with fully grown koi?
Not sure if this is the right place to be asking this question, but thought I would start here. If anyone has suggestions of where to post this message over in the garden section, please advise.