I want to add the low rent version of the clay substrate.
Clay kitty litter, peat moss, coco fiber, calcium, water, mixed in a bucket. Spread out thin and left to dry. Crushed up into small pieces and used as a substrate over LECA. Leaf litter on top. Seeded with springs and isopods.
This was 3 or so months ago. The substrate is holding up. The springs and isopods are going crazy under the leaf litter.
I can't say how much the plants like it. This tank is a pothos only tank, and that stuff will grow in anything.
I'll try to get some pics but my camera is a point and shoot and doesn't do close up very well.