Sodium: The Silent Killer in Hydroponics

Dr. Russell Sharp explains why sodium is highly toxic to plants, how it damages cellular functions, causes nutrient imbalances and reduces yield, and why osmotic stress is not the only issue.

He outlines common hidden sources of sodium in hydroponics — low-grade fertilizers, micronutrient chelates, grow media, water sources, insecticidal soaps and recycled inputs — and gives practical advice to avoid sodium contamination (use high-purity ingredients, potassium bicarbonate, and proper media buffering and water treatment).

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