hello Vern I don't understand why you want to "fix" the color pattern. I understand that the Rio Mamore fish naturally throw both "Red" and "Blue" color forms. I would think this would be more desirable then one particular color. Knowing that you get both colors from a single pair who allow you to trade or sell both color forms to friends, other hobbyists or to the Local Pet shops. But if you are trying to "Fix" either color form, the method you described should work if you line breed the fish. Running two lines of the same stock and then crossing the 3rd generations will keep the lines from getting too week in time. You will also eventually have to cross in new blood every so many generations down the line. Good Luck, the Mamore fish are very nice fish. A friend of mine is working with the Blue form and they're just gorgeous. John ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@majordomo.pobox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@majordomo.pobox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!