Just posted this in another thread, my tap is 280. I stopped adding calmag in my nutes (hydro store guy told me to do so cause the calmag in the tap). I did that when I went into bloom. Im about to harvest and the plants seem fine. Im in coco though.
well my leaf tips are yellowing and i was thinking it was from that cause its about 4 weeks old and ive givein it 2 feeding of dynagro foliage pro 1/4 tsp