Or... you could continue to walk thru the pond daily and kill what
attaches to you. ;o) ~ jan

That wouldn't necessarily eliminate a problem. aiui, there are leeches that
like mammalian blood, and there are others that will prey on fish or frogs.
So you could eliminate the yuck factor, but not the hazard to your koi :-(
Derek

Come on Derek, try to keep up. That was a joke (note winky face?).
Besides, the OP didn't have fish in the pond. ~ jan

-----------------
(Do you know where your water quality is?)