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Old 11-15-2017, 05:19 AM
Marcus_in_the_Darkus Marcus_in_the_Darkus is offline
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Join Date: Mar 2017
Location: Legal in Massachusetts
Posts: 854
Default Persistent low pH in effluent

I hope someone can help me with acidic runoff from coco hempy buckets in my Angel's Breathe grow. Due to a bad pH pen I was feeding some of my plants nutes at pH 4.3 when I was intending pH 5.9. This resulted in yellow and brown spotting and drying out of older fan leaves as macronutrients were locked out. I flushed everything and monitored EC and pH of the effluent...two plants continue to have very acidic drainage of around 4.2 - 4.6 even after flushing, a lot, and then feeding with pH 6.2 solution. The other plantso are doing great and effluent pH is similar to what I'm feeding them but these two plants take pH 6.2 at the top and drain out pH 4.3 at the bottom. These plants also are showing yellow brown spotting and drying of fan leaves again. I've flushed with pH 6.2 tap water, pH 6.2 CaMg solution, and pH 6.2 nutes and the drainage remains acidic. I don't understand what's happening in the root zone but I don't think it's good.

Any suggestions?
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