I'm using sphagnum moss that's kept moist right underneath them & sort of loosely packed, in order for air to get through more freely. I also just added a little bit of water to it (even though it was damp. That egg was a little sunken in yesterday to. I have read that people have or do use sphagnum moss with great results & yes, I've read too about the use of perlite or vermiculite- a downfall, (according to some) is that air doesn't flow through it as well as it does though moss. I JUST tried candling them with a light & can see blood vessels- last night I couldn't see any when I tried but now can-AWESOME! They're fertile!! I'm excited, acheela. Fun, fun!