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To raise nitrate by 2 ppm NO₃ in 100 L: 4 ml.
Maker’s daily maximum: 1 ml per 100 L (1 ml for 100 L).
Only when nitrate is too low: test NO3 and PO4 first (aim N:P ~16:1), dose gradually toward 1-4 ppm NO3. Max 1 ml per 100 L per day.
• Original and NEW formulations differ (0.5 vs 1 ppm per ml)
aquaforest.eu/en/products/lab/microelements/no3/