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FW Protein Skimmers

Fresh Water protein skimemrs have been discussed on other lists.  They do
exist. People have actually seen them work.  The problem is that because of
the different water chemistry, a FW skimmer requires a much bigger skimmer
with different relationships between the sizes of the various components.
Supposedly, there are formulas that allow you to calculate the sizes of the
various components for different types of water; i.e. salt, brackish, fresh,
etc.  It also takes a lot more energy to get the same output from a fresh
water skimmer as opposed to a salt water skimmer.

All of the units that people mentioned that they saw working were in
commercial fish farm applications.  Not really practical for a small 200
gallon tank.

Best Regards,

Roger Gordon