Currently in week 3 of flowering i noticed the leaves on 1 plant have claw like leaves and the other plant leaves are turning yellow im not sure how to fix it
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• What strain, Seed bank, or bag seed
• Method: Soil w/salt, Organic soil, Hydroponics, Aquaponics, KNF
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• Vessels: Pots, Grow beds, Buckets, Troths
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Water and nutrient needs change at this stage. Looks like they need higher PPM overall with extra potassium and phosphorus (P&K) for the flowers.
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• What strain- gorilla glue bag seed
Ice cream cake bag seed
• method coco perlite Mother earth
• Vessels: fabric pot 5 gallon bags
• PH of Water, 5.8 -5.9
• PPM - 1300-1400 as aid on feeding schedule
• Indoor
• Light system 2000w led and a 100w led
• Temps; Day-74 , Night-55-65
• Humidity; Day-40, Night-40
• Ventilation system; Yes 4 inch vivosun
•
• Co2; , No
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I was going to flush because it looks to me like nitrogen toxicity
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Usually presents with super dark leaves. It may be salt build up causing lock out. A flush would not hurt but I would first check the runoff from straight water before doing a full flush.
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Run off was 6.5 
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6.5 Ph is fine. need to know PPM of runoff.
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A tad cold i would think also. Slows them down. I would try for an 80+ lights on and a 70 or so off. I had 1 tent i yanked because room it was in stayed cold. 75 top…65 bottom and got tired of messing with it. Moved clones in it to big tent. Difference was remarkable both in growth and nutrient uptake. Just an opinion.
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Its coco and perlite it’s supposed to be around 5.8-6.0
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Sorry was thinking soil…I don’t know coco but still don’t think N toxicity. Probably the Ph issue then.
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It looks like ur plants are hungry for potassium and phosphorus .are u using bottled nutrients or are u using organic fertilizer
Coco PH should be 5.6-6.0 is the sweet spot range. Higher or lower than the PH range could prevent certain nutrient uptake. I would flush to get that PH down and follow up with a feeding around 5.6 and 900-1000 PPMs including additional phosphorus and potassium 
Bottled nutes