The Fana Marin is only trace elements and a few other things. The Mag component is BRS bulk mix. SO you don't get Mag from the Fana Marin Elements. If i understand the Balling method with Tropic Marin you want to only doe the Tropic marin Alk component to begin with and use calcium and Mag from something other than Tropic marin's mixes. Then once you have obtained the level of ALk ( with tropic marin mix) and Calcium and Mag with another product you then start dosing all 3 Tropic Marin Components in equal parts. That is from what I understand the only was to do the balling method the correct way in dosing the 3 parts in equaly otherwise you will be chasing one of more of the parameters. I pretty sure there is a youtube video confirming what Im saying. There is also a good one detailing the different methods of Balling, Balling Light, and 2 part.