I thought from everything I've ever read about protein skimmers, is that they were pretty much useless in freshwater and did nothing. I might be wrong here but I do remember reading that in more than one place if this isn't the case I'm sure that the companies making them would be pushing them on us freshwater hobbyest as well as salt people. John W ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!