I would get the brs 2 part and follow their instructions. They are pretty good at that! This will get you started on the right path while you do more research and get comfortable with dosing a 2 part (3 part) system. @Randy Holmes-Farley did the work to create the BRS recipe a long time ago. There are other variations of this recipe. Even those that include the magnesium part. His articles and loads of information posted by him here are great to read and will give you all the knowledge you could possibly need to implement and tweak whichever recipe you wish to use. Starting out with BRS makes it easy to understand and fairly safe to dose.


