day 43: watered plain water ~10l per pot. still have not fed the plants. Runoff EC seems to be stabilizing @ 3.0 mS/cm for all pots +/- 10%
day 45: added some gypsum(CaSO4) to the soil. 1 tablespoon per pot, will water when pots dry
day 46: watered to saturation and some runoff, next watering i will feed 20-20-20
day 49: watered and fed (20-20-20 + epsom salts )