protein skimming frshwater???

[sphelps]

I'm confused? What's the purpose of this skimmer? I get using one for a large pond but as far as aquariums go isn't water cheap enough to easily do large water changes to reduce nutrients? The cost of the skimmer and the power it uses will never pay for itself or be as efficient as simply changing water.

There's a reason these are used in SW and not FW.