Thanks for that info!
I'm actually planning to add spider plants to my lizard tanks - I'll try to use perlite free potting mixture.

I used vermiculite for my cal kings to lay in this year - never again, they got it all over themselves, all in their water dishes, very hard to clean them off properly.
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11.14 L. getula californiae (Cal. King)
2.3 L. getula nigrita (MBK)
1.0 L. getula floridana (Brooksi)
1.0 Pantherophis guttatus guttatus (Corn)
0.1 Pituophis catenifer catenifer (Pacific gopher)
4.2.14 Elgaria multicarinata multicarinata - (Cal. Alligator Lizard)