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Hey buds. I've been growing Okra hydroponically and it's been good for about 4 weeks now but my root tips seemed to have turned brown, but the rest of the roots are still very white, just the tips. Is it the beginning of root rot or is it just nutrient staining? It probably should be noted my older leaves have been turning yellow. I'm using full strength nutrients.. Haven't been growing very long so I'm still a noob