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Comparing Fertilizers

Please someone tell me to stop looking at numbers :-) I think I have too
much time on my hands today.

Looking at the contents of TMG, PMDD and the Flourish line I'm confused
about all the "extras" included in Flourish and what purpose they serve.  I
thought I'd write the numbers down in a table to make it easier for me to
compare the products, you can see the table here:

I know both TMG and PMDD have a good reputation so the first thing that
comes to mind is what are all those other elements contained in Flourish
for? Are they not required for plant growth or readily available in our tap
waters and therefore not included in the other products? The values in the
PMDD colum are not percentages of the total contents so I know they can't
really be used to compare the products correctly but it looks like TMG and
PMDD are quite similar except for Nitrogen, or at least they contain pretty
much the same elements. Flourish on the other other hand has a little of

My second question regarding Flourish and Flourish Trace, doesn't look like
Trace has anything that Flourish doesn't, just a little extra CU and Zn. If
someone is using Flourish would it be safe to say they do not need to use
Flourish Trace as well?

Please excuse any errors that might be in the table, I wrote them down
rather quickly and mainly to compare the elements contained not the amounts.
Not sure what HEEDTA is but it was listed on the page where I got the TMG
values from, actually I'm not sure what the differences between any of the
last three are :)

Giancarlo Podio