Hydroponic pH Management Guide 2026 | Testing & Adjustment
Master pH management for hydroponics. Learn testing, adjusting, and maintaining optimal pH levels for healthy plant growth.
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What pH should hydroponic nutrients be?
Most crops prefer 5.5-6.5 pH. Leafy greens and herbs: 5.5-6.0. Fruiting plants like tomatoes: 6.0-6.5. Check daily at first, then weekly once stable. US tap water is usually 7.0-8.0, so you'll need pH down.
How do I lower pH in hydroponics?
Use phosphoric acid-based "pH Down" solution. Add drops slowly, mix well, test again. Typical tap water needs 2-5ml pH down per gallon. Always add nutrients first, then adjust pH - nutrients change pH naturally.
Do I need to test pH every day?
Initially yes, until you understand your system. Once stable, test every 2-3 days. Small systems fluctuate more than large ones. Keep a log - you'll spot patterns and predict when adjustment is needed.
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