>>>How do you get the cubes of Polyfilter in and out when they need replacement ...<<< Is there a problem if you just leave the old one and simply add a fresh one? Bill Vannerson McHenry, IL http://ourworld.compuserve.com/homepages/william_vannerson ------------------------------------------------------------------------- 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"!