with the led's next time start with cal/mag from the start at least that's what I did. and although I use a different Dr. Earths, Nitro Big, Golden Bloom and Flower girl, what I have found works well is plain water every other watering and back way off on the recommended dose. I've been going 1/4- 1/2strenth and think it should be more like a 1/4 mix. but the damage done wont reverse so as long as everything else looks good you should be fine. and that Dr.E doesn't need ph'ing. always 6.3-6.6