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  1. GNAR

    Dark blotches in the center: toxicity or deficiency

    Setup is rdwc PH is 5.9 and steady Room temp 72 Res temp 68-70 Ppm 150 of botanicare base and grow for 26 gallons of R/O Seedlings are about a week old, started noticing some dark blotches along the center of the leaf today. Can't determine if this is a phosphorus toxicity or a deficiency. Any...
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