g no 3

Just reached the start of week 7 and have changed lights to 12/12, didn’t get time to change out the bulb so will do that tomorrow. A couple Calcium deficiency spots on some of the new leaves on two plants - have re-introduced grotek cal-max into schedule. My tap water EC is 0.1 so I’ve been adding enough to bring it up 0.4, any comments on this would be great! I’ll try and gauge to see if they need any extra feed over the next two weeks, I have a bottle of mighty growth enhancer I can use if they need a little extra boost around that time.