Reply. Hello Eric. Thank you for your interesting question about using a Protein Skimmer in a freshwater aquarium.
Protein Skimmers are mechanical devices that are made to be used in Marine Aquariums, which contain saltwater with lots of salts. You can use a Protein Skimmer in a freshwater
aquarium. A skimmer will not hurt the freshwater fish or degrade the water quality, and
the freshwater will not damage the skimmer.
But a Protein Skimmer will not do much to improve the quality of the water in a freshwater aquarium. So the short answer is that if you have a freshwater aquarium you do not
need a Protein Skimmer. The rest of the information on this page is about what a Protein Skimmer does.
A Protein Skimmer removes large molecules from water. Proteins are very large molecules with very large numbers of atoms. Protein Skimmers originally got that name because they
were thought to skim protein molecules from the aquarium water. Actually it's now known that Protein Skimmers also remove other stuff from
The marine water in Marine Aquariums is quite expensive. One hundred gallons of marine water usually costs at least $20.00. Because of the high cost of marine water, it is
cost effective to use a Protein Skimmer to remove the large molecules from Marine Water.