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    Extreme overwatering - Help me save my garden?

    forst grow, 3 auto strains 45days old growing in soil under 400w CFLs + 6h of sunlight outdoor 2 in 5gal pots and the transplanted one in 3gal), RH 50%-75%, temps indoor 80f-92f, outdoor 95f-105f (big fan blowing outdoor), they were doing great till got too low ph (5.2) that leaded to nutes burn...