Low pH, yes... and soft. I have also found that taeniacara do a better job of being parents if they have a very small space to lay their eggs and attach their larvae... maybe 3 cm. deep, and only big enough around that a pencil will fit into it... they will prefer the hole to be in wood. Martha ----------------------------------------------------------------------- -- 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