I call it day 1. There is actually nothing much to say except that they´re growing.
My tapwater measurements are 44.1 Calcium and 22,6 Magnesium.
To measure and use the correct Calcium and Magnesium relationship, i wrote a calculator to be as exact as possible with my calmag relationship by tuning in my tapwater to 3 Ca : 1 Mg at the moment.
I also calculated the vegetation-phase with a demand of 80 mg/l Calcium and 26,67 mg/l Magnesium.