skimmer on freshwater wet dry?

[infin]

will a skimmer do anything for a wet dry? reason i ask im looking for a new wet/dry filter and most i can find that a larger have the skimmer built on, and they are cheaper than the ones without.

 

[MilitantPotato]

They won't remove organic waste like they do in saltwater if that's what you're asking.

They will increase disolved oxygen, but that's about it.


http://www.algone.com/protein_skimmer.htm

Protein skimmers work for marine aquariums only because salinity increases the surface tension, which is needed to attract the surfactants. In order to create the surface tension needed for freshwater, the apparatus would have to be under very high pressure.