ebb n floot

Hi There, my new run looks way better then the first with my new Setup but: Operating with green house powder nuts. nutriculture Ebb and Floot ~ 60 pots in seramis, 600l Water 400l RO 200l normal. Adding Calcium till i got 0.3 - 0.4 EC and then Long Flower till EC 1.5 the last 2 weeks. PH 5.5...