Thousands of years ago...talked to the owner at MACNA, these rocks are from ancient coral reefs, now underground!They come from the sea.
Thousands of years ago...talked to the owner at MACNA, these rocks are from ancient coral reefs, now underground!
Marco rocks shared a booth with a friend of mine, Bob (exotic fish and coral in Ct.) so I was specking to the people from Marco for awhile (hours)...The rock is mined from underground, the same material that the state of florida uses in road construction! They insist, however, that their area of mining is a cleaner rock, with LESS phosphates than the usual areas. The rock should be cured!I think they were part of the ancient coral reefs thousands of years ago, but now just part of the coast lines as Rick said.