yep flint rock its non-porus(volcanic glass) but its bizarre twisted shape makes lots of nooks and hidey holes for fish and its local to my area (buying rock by the pound is insane) and yes that is a nice pice of wood i had to did through a bucket of hundreds of pices to find that pice much to the dismay of the staff at the lfs
Lol - well it paid off, because it looks really good
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Tropical Fish Keeping
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