Green Leafs with a Curling, Funky Twist Problem! Any Ideas???

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Hi Im new to the site and have been growing our medicine indoors for a little over a year and now cycling 12 flower/12 veg continuously every 10 weeks which = 5 cycles a year now yeilding approx 3-4oz per plant per cycle. So we are new but I believe on the right path thus far.

As you'll see from the pics provided that these clones and one seedling have now been vegging for 7 weeks to nearly a perfect grow cycle.

THE PLANT PROBLEM is we introduced a new strain (bottom right plant of main pic).. Ajan's Hawaiian Snow which was grown from one feminised seed in hopes to become a mother and continue cloning for future cycles pending results. Two days ago at first i thought she was just desiring more water (due to slight drooping) and so I provided. Since then she has worsen as pics show and description below.

As you'll see from the pics this (1) new plant/strain has some perfectly green leaves that have began drooping, curling, funky twisting and a few even dying.

Please any ideas could be helpful before things continue to become worse? Thank you

A Perfect Garden has Weeds in it! :-?
 
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