Anybody out there who has experience or info on a 'External Countercurrent CO2 Reactor' other then the one from Hydrologix or Westaqua ? Any hints, links or info is appreciated. Sorry for the slightly off topic. Thanks Juergen ------------------------------------------------------------------------- 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. apisto-digest@listbox.com also available. Web archives at http://lists.thekrib.com/apisto