Quote Originally Posted by John View Post
Actually, one more question for you - what is the grey layer above the LECA in your planted vivarium photo?
The substrate is a mix of flourite, leaf litter, peat, coco husk, and sphagnum. I think the grey you are seeing is the condensation from the drainage layer that I couldn't reach when I wiped the glass down to take the photo.

The background is sodium bentonite, but it doesn't really look grey because its mixed in with peat, flourite,and LECA dust.