<span class="link_user">@Chucky324</span>, Thanks for that offer. I have posted a new grow question with photos for week 8. On Day 38 noticed some brown spots and tip burn on two of four plants. Was not sure if I had nutrient lockout and flushed all with 1.5 gallons of ph 6.3 water. Suspected K deficiency from lockout at the time, but now believe it was Calcium deficient. I have read many articles and illustrations about deficiencies, including the one you posted in one of your diaries. I would like your opinion of my problem. Thanks