Is this a potassium deficiency, and if so, how do I fix it?
Ec was 10 as of a week ago, got it down to 1.7 last watering 5 days ago by flushing and fed with Jack's 20-10-20 peat-lite today at 1.3 ec, runoff was 2.2.
Ph is around 6.5.
Pretty sure the calcium issues are fixed.