From the Greenleaf site - Plantex CSM+B – 28.6 grams (Trace Elements (TE) recipe updated 4/11/2016, previous recommendation was 40 grams),
If 28.6g of TE yields .01 PPM FE then 40g of TE would have yielded approx .013 PPM. However, the site also states that the previous recommendation prior to 4/11/16 was 1ml per gallon, so if both the dose and the mix changed, the reduction in PPM cannot be 10 fold from .1 ppm to .01ppm, not exactly. Unless the product itself changed.
If I am incorrect, please show your math.
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