Not sure if it would work. Surface tension of fresh water is much lower than
salt water. Not sure dissolved organics will fractionate out.

"Peter Breed" wrote in message
...
Anybody running a protein skimmer on a pond?
I've read the argument that marine aquatics keepers tend to run skimmers
because for them water is comparatively expensive, and for freshwater this
isn't true, hence its not necessary as water changes remove the need, but
due to low rainfall there is a high risk a hosepipe ban here this summer
and anything that reduced the need for water changes seems like a good
idea.
Peter
East midlands, England