Well, I can only speak for myself. Once the seed has sprouted in the rockwool, I begin the first week series. For me, I have only used Flora series and I have memorized the ppm for each individual solution, per each tsp. For ex:

In my 1 gal tank I added 2 tsp of micro in my tank and took a reading for ppm. In 10 gal, 2 tsp alone are 200, then I did that for each solution and it has been consistant with me.


Maybe some other individuals can help you out more. Sorry couldn't help ya out more!