Mike J I have always found that kribs sex ratios were more controlled by pH then Temp... I could always alter the sex ratio of kribs by either lowering or raising the pH. Or so it seemed. "Where its frigid and snowing" John ------------------------------------------------------------------------- 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 Trading at http://blox.dropship.org/mailman/listinfo/apisto_trader