Need some advice on how to properly clean some rock

[eli@fijireefrock.com]

Originally Posted by Navarchus

Can you tell me more about the acid thing?

Muriatic or Hydrocloric acid is a highly corrosive,strong mineral acid.Hydrogen Chloride solution.
In simple dilute the acid with water place your rock in it, make sure its outside or very well vemtilated acid will react with calcium (your rock is a calcium base) stripping a thin layer out into solution, clean your rock afterwords thoroughly with some fresh water test for ph and your rock is ready for a cycling period.