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    pH problem

    I have 6plants that are 3weeks old under 400w mh which is dimmed down to 75% and about 2feet from canopy.temps/humidity usually 75-77deg/50-60rh.using ffof soil haven't added any nutes other than molasses.plants started yellowing and slowed growth.my tap water was 8.5ph so I adjusted pH 6.5 and...
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