just a bit of a misunderstanding:thumbsup:. I figured it was self-explanatory since i posted in the hydro forum. I grow both which is why i stated "soil/hydro". I use FloroNova for both and mix my ferts the same way. I feed the soil twice a month and change out my hydros every week, but always use the same mix ratio based on age and cycle.

I guess my whole ppm question had to do with total ppm ratio per amendment and total ppm outcome. For example, using 1gal water @ 11ppm. I mix 5ml CalMag, the ppm goes to 240. I mix 7.5ml of FN in another gal. of water and get 600 ppm. When i add 10ml of CM to the FN water the ppm goes to 900+. Should i go for individual ppm or total ppm?

If the ppm with CM alone is 240, do i add ferts to raise it to 600 total or add the original7.5ml?