Roy wrote:
Protein skimmers do not work worth a flip on fresh water.......There
are other methods your able to employ to remove proteins out of the
water, other than a typical fractionator or protein skimmer....

I thought you could use a skimmer in FW with ozone. Never tried,
though. Here's an ozonater and skimmer for koi ponds.
http://www.koicarp.net/filtration/pr..._skimmers.html

This article says that if there's enough protein that waterfalls foam a
bit, you can skim.
http://www.koimag.co.uk/featureRead.asp?ID=2049

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