My first grow, my only grow lol, had the same thing going on as your girls. tried everything and I was running them pretty high on the ppm, way more than yours and I never got them to clear up totaly. some on this forum tried to help with suggestions, but they just stayed the same. They were growing in the 5 gallon ebb monster system and my 3 test plants were in DWC that I made in a flood table and them 3 never showed any signs of stress or any deficency ever! so I thought it could be the plasics that was used in the making of the hoses or the bucket and so on. Never really figured it out, couldnt be the strain as the other test plants showed pure happiness...lol
Your grow looks great! Nice and frosty and I really like the color!
Thanks for taking the time to post!
Bowski.