Trying to get anyone to offer a little advice. I am still a newbie on the first grow. New pics of plant issue(s), grow box, etc. now attached. MUM chamber is (5) 15w 18" flouro's looking good still, Flowering Chamber 150w HPS w/ cooling hood, temps 75 (dark 12) 81-85 (12 light cycle) plant was 8-9 weeks old when (12/12) began, in approx 2-1/2 weeks, Schultz Orchid Bloom being used, cut back to pure RO water when yellowing started. Miracle Grow Soil used, could not get bubbler to root clones so decided to try using soil until sure that box would work properly. Plant types...Dirt weed bag seed, germed 8 - 5 female, this one is Sativa, Indica Clone in same room, was taken off of flowering mum (during sexing) and is doing great, same soil, same ferts, same everything basically w/ no issues. Pics and reading on sites make this problem look like could be caused by several different items. Could use some expert advice...plant seems to be getting darker on new growth since switching back to Pure RO only. ???