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    Phosphorus with cal/mag deficiency?

    Hey guys im growing 2 purple kush and white rhino in a rdwc. I notice a few tip burning once i started to flower so i brought the ppm down to 600s with RO water. Now i started to notice dying on the purple kush lower fan leafs and rusted spots on the mid fan leafs while the white rhino is...
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    Is this Calcium Deficiency?

    Hey everybody, newbie here. My first grow and i noticed a few brown spots, yellowing tips, a few leaf curling. Running a rdwc setup 4 plants.
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