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RCDW week 3. water temp 68, ppm 1150. Ph 5.8-6.1. room temp 78. RH 55% . Silica, hydroguard, cal-mag. General hydro. Micro, veg and flower. 2 photos. 2 autos. 3rd crop. Former 2 crops no issues. Everything the same. Have flushed twice. Yellowing starts with spots. leaves curling in.