Growing in ffof 2nd week of flower ph in on both girls were 6.76 ppm in was 817,one girl runoff was ph 6.31 ppm 3390 the other girl runoff was ph 6.02 ppm 2490 do I need to be feeding them ppm seems high but they look fantastic white widow crystal meth strain 4×4 tent led bloom plus bp 3000
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Got a pic of the plant so we can see how it looks?
You may have build up that needs flushed. Id flush at a higher pH to help get the medium pH up a bit before it drops lower and get some build up out.