I like the little saucers that are used for standing pots on, I have these about 3" diameter. Turned upside down with a notch out of the rim they make nice low roofed caves. Alternatively use pots that are small, there are ones that are about 2" rim diameter. These again are stood on the rim and either have a notch out of the rim or you can enlarge the drainage hole. I think they prefer to use the rim style entrance as they can pile sand in the doorway to feel secure. Some Apistos will block the door and not come out at all until the fry are free swimming. Use pots without glaze. I see some now that are glazed on the inside, don't know what could leach out of there into the water. If you want to make your own then then do not need to be big, perhaps 2x2 x 0.75" high. The opening only needs to be 0.75x0.75" as the male doesn't need to fit in but can do his job from outside the entrance. Regards, Ken. ------------------------------------------------------------------------- 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"!