Hi John, I try with crickets ranging from 3-5 mm (that should be around 1/8 inch). Good luck with the rocks. Just drop me a mail if you have any questions. Jesper
:Those darn baby collareds are sometimes very difficult once they get off on the wrong foot. Sounds like you are heading in the right direction now though, luckily. I'm about ready to dive into some artificial rocks. I may need your expertise soon!!!