First photoperiod grow

They grew nicely even though they´ve got some PH problem. I was watering them from week 4 with solution PHed to 6.0 or 5.8 but despite all these preventetive measures their PH was still too high, we´re talking like 7.0. So I watered them with solution with PH 5.2 but still it wasn´t what I´d like to see... PH runoff 6.8 but some had 6.5 (MAC and panty punch) and they´ve recovered pretty well. But Lemon orange and king´s juice still too high runoff PH 6.8 and 6.9. But despite all these problems they´ve grew nicely. ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Growing conditions: Lux: 37 000 - 42 000 Temperature (day): 25-27°C Temperature (night): 19-22°C RH: 60% Light distance: 55cm Light intensity: 80% EC: 1.200