what is the difference? i have used Crush Coral since i started aquarium hobby and few years ago LFS recommended me Dolomite and i have purchased 2 x 25lbs. Yesterday i was cleaning out my filter i and ran out of Crush Coral (CC) i added Dolomite.. i'm currently keeping Stingrays, Plecos, Datnoids and an Arowana.. what are the pros of either?? both raises pH and the appearance of the Dolomite are the same as CC..