Chlorotic babys, Thinking Iron Deficiency . Help if you came across this please.;..

Once you reach to 1.6 to 1.8ec on your feed is where you stop for veg. Cheers

5.8 ph for veg. This stage 500 ppm .1.0 ec. Increase every week. Canna aqua or Dutch nutrient formula, DNF is what I recommended for hydroponics. Both were made especially for hydroponics and has everything your girls will need food wise for your girls. 7 was way off and as long as you fixed your ph down to 5.5 to 5.9 they will bounce back very quickly. Increase your feed by 100 ppm 0.2 ec every week when you see good growth. Keep your water cool so it can hold the maximum amount of dissolved oxygen needed for vigorous growth and flowering. That temp is between 62 to 68 degrees. It will also keep your roots nice white and healthy. Cheers

Hello there Maveryc, Your plant doesn't receive enough nutrients due to wrong nutrient concentrations or nutrient lockout. Lower your pH to stabilize the soil, use a nutrient ppm meter to check the water runoff pH. Good luck with your project, I wish you all the best! 👽

Sulfur deficiency is much more common and likely for micronutrients. Make sure you are using a micronutrient supplement for hydro. You'll have all sorts of issues otherwise, especially with RO water. Epsom salts can fix sulfur problems if you're waiting for a micro fertilizer shipment. If you have micros in your res, I wouldn't change anything quite yet. You said you had a pH problem, I would give it a couple of days. If it doesnt get worse, then you're fine. If it starts spreading, consider trying to fix it.