skimmers only work effectively in marine tanks or with high fish populations with tons of organics, ponds etc: while it may ,work water changes and good biofiltration in freshwater tanks will probally yield better results in the long run.
Ok. Seems like the only kind for protien skimmer for freashwater breaks down into smaller bubbles. This one is not the right design. I now have a large protien skimmer for sale.
My large used acrylic aquariums I got off of Craigs List were SW. They all came with protien skimmers. I could never get them to work in my FW set up. I have a few used skimmers for sale too............