AsNoriuanswered grow question a year ago I would say yesterday BUT your plants are sick, never send sick plants to flower, sort issues first .
Magnesium because of overwatering, but you say you learned how to water right. Lift each pot individually if light load with water, if still heavy - wait. You can have two different regimes even, all girls drink diferently.
When this is sorted and plants look perky, do scrog and flip to 12-12. They can triple current size, so have few more levels of scrog ready to install.
Good Luck !!!