AN 3-part ph-perfect with RO Water. How much Mg and S do you supplement?

Discussion in 'Sick Plants and Problems' started by HaHend, Jan 23, 2014.

  1. Hi,

    I am using AN 3-part ph perfect fertilizer with R/O water and my plants developed a Magnesium and what it seems to be a Sulfur deficiency too.

    After looking for the reasons I used this nutrient calculator.

    By using this calculator I figured out that the AN fertilizer barely contains any Magnesium and Sulfur.

    I assume they solely rely on the tapwater to supply Magnesium and Sulfur.

    If you are using AN with RO water I am interested to know how Magnesium and Sulfur you are supplementing? (ml or ppm, or both)

    Some PPM stats:

    AN 4-4-4 (per liter): 5ppm Magnesium, 9ppm Sulfur
    GHE Lucas Formula Veg 5M-10B (divided through 3.8 to be comparable to AN'S per litre ratio): 46ppm Magnesium, 30PPM Sulfur
    GHE Lucas Formula Bloom 8M-16B (divided through 3.8 to be comparable to AN'S per litre ratio): 73ppm Magnesium, 49ppm Sulfur
     
     

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