My tap water is only 35ppm, I need to amend calmag to it, lately I've been using Flora Nectar instead, as it adds Mg but not Ca and allows me to add a cc more of AB (Canna), but I haven't used more than 4cc per liter so far, If I use 4cc per liter, the PH goes down to 4.8 and I add PH up on top...