Are these aquarium gravel okay for potting mix?
I finally got my hand on some turface through eBay ($15 shipping for a pound...), so I'm making some new soil. I still couldn't find anything for the gravel part other than aquarium gravel. I found a few unpolished, edgy ones. Do you think these would work? And which one is better?
The second one is slightly smaller compared to 1, and have less dust. But I would wash them before use anyway.