On 24 Jul 2003 15:16:32 -0700, (Shane
Kennedy) wrote:

a large mouth bass will clear them out for you
but if koi/goldfish are small, he might clear them out too
A Pumpkinseed, Blue Gill, Red Ear or other small Sunfish will whittle
them down quickly.

Then again they can be fin nippers on the Goldfish and Koi.
Dave Fouchey, WA4EMR
http://photos.yahoo.com/davefouchey
Southeastern Lower Michigan
42° 35' 20'' N,
82° 58' 37'' W
GMT Offset: -5
Time Zone: Eastern