Quote:
Originally Posted by Bud
That is not gravel...it is either sponge rock or lava rock....you may buy online some medium charcoal, bark and clay pellets and add that to what you have as mix.
Pictures would be nice to help us be of help to you even more.....
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It could be gravel, actually. I've got several orchids from nurseries in South Africa that has pea gravel in it, or rather on top covering the moss, for instance. It's protecting a bit against algae and holding things in place, but it's not the same as the perlite I'm using to add to my growth mediums. Sponge rock is the same as perlite, isn't it? And I know lava rock when I see it, but that's very rare here in Southern Africa.
Yes, pictures would be good!
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