Great Stuff Foam
I used the Home Depot foam and it looks great! Keep in mind that it expands. I then covered it in black aquarium silicon. Then I covered the silicon in the coconut "bed a beast" husk. The coco husk is the stuff that comes in a compact brick at the pet shop. I'll post a picture soon.
The greatest drawback is that the orchids or other air type plants can't grow directly on it, like the blanket looking stuff.
Matt
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