Over watered? Nute burn?

big problems!!!! think im ph locked. Ive been using my fish tank ph testing kit so i worry it isnt accurate and ive been waiting on a ph meter im really hoping is coming in today. What do you guys think?

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they look better but i still have funny looking curled down leaves.... I have the water on 15 minute cycles 3 times a day spaced out.... under water, over water?

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CalMag deficiency. Things in hydroponics happen quickly. Inter veins are darker than the leaves. Leaves are folding down. Ends are cupping. Purple on the stocks. You need to balance out your nutrients with supplements.

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still struggling, but for some reason today i remembered the pots could be removed today. So i pulled them out and saw they were soaked.... So i rinsed and unclogged the drain buckets and now have the plant pots drying. So i think i can finally diagnose my problem as over watering? Keep my fingers crossed hope i dont have root rot....
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how long should i let it dry before i start watering again? these pics are from today after like 24 hours of drying the clay was still wet..
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