Help!! Potassium deficiency

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Thanks mate

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I also water until have 15 to 20% run off, my plants are at the stage wer they need that much water also i dont live at the same house as my plants they...

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Na I was away for the weekend and couldnt water them thats why the droopy/thirsty plants but my medium is coco/perlite, fabric pots, I use flora trio...

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I feed all 4 my plants the same but it's only happening to 2 of them also a few of the bottom leafs are turning yellow like wen you flush at the end of...

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Can any one help me identafy this deficiency or if it even is one I think it is a potassium deficiency by going off the GWE diagnose sick plants method...

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Thank you all for the help

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I am curently using General hydroponics flora trio + calimagic, armour si I was wondering what would be the next supplement to add to my nutrient line...