Simon Cole
Member
I just wondered because the w/w% declaration omits whether the product is chelated?
Silly question really, but the composition of these elements is quite different to other industry-trace element formulas designed for fertigation - e.g. the ratio of iron to manganese is balanced quite low to avoid incompatibility. It might also be cheaper and more beneficial for Tropica to use salts chelated with "organic" agents like fluvic or humic acid. I also noticed that S and K were present, which are usually salts, although I am unsure whether preventing K-substitution is less favourable with EDTA as opposed to the "organic" options. I have also found that my EDTA trace mix forms precipitates more readily and this might relate to the fact that the Tropica product is sold in a clear bottle and over considerable time is unaffected by light.
Overall, I am quite impressed by the product. It certainly has its advantages over my usual dry EI ferts.
Silly question really, but the composition of these elements is quite different to other industry-trace element formulas designed for fertigation - e.g. the ratio of iron to manganese is balanced quite low to avoid incompatibility. It might also be cheaper and more beneficial for Tropica to use salts chelated with "organic" agents like fluvic or humic acid. I also noticed that S and K were present, which are usually salts, although I am unsure whether preventing K-substitution is less favourable with EDTA as opposed to the "organic" options. I have also found that my EDTA trace mix forms precipitates more readily and this might relate to the fact that the Tropica product is sold in a clear bottle and over considerable time is unaffected by light.
Overall, I am quite impressed by the product. It certainly has its advantages over my usual dry EI ferts.
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