Dechlorinators, micronutrients and EDTA
Sorry to bring up more fertilizer debate, but I have a few quesitons:
1) I currently use Tap water conditioner, which claims to dechlorinate
and 'remove heavy metals'. How long is this active after addition to tap
water? Will this result in a serious reduction of micronutrients (Zn, Mo,
Mn) added after dechlorinaiton? Any dechlorinators which will not interfere
with micronutrient fertilizers? I remember hearing that Na thiosulfate
was an effective
dechlorinator--does it work on choramines, and at what concentration?
2) Do other micronutrients (besides Fe) need chelation (ie Mg, Zn,Mo, Mn) ?
For those of you that mix your own fertilizer, how does addition of
non-chelated metals to a solution of Fe-EDTA affect their solubility and
availability to plants?
I have been using a friends homemade micronutrient mix for
a few months (he wishes to remain anonymous after the recent Dupla vs PMDD
debate ;-) but am not completley satisfied with the results (he DOES get
good results, however, so I'm keeping an open mind here). Before I
begin playing around with the recipe, i thought I might try the 3 Dupla
ingredients as a positive control. I'm haveing a
hard time with the $50 price tag though. So one question about Dupla:
3) What is 'Duplagan' exactly? I think George or Karen mentioned that
it supplies Mg, can anyone think of a chemical reason not to add the Mg
in with the daily drops, which contain mostly chelated iron?
George will frown on this, but I'm thinking of buying the tablets and
then adjusting my 'daily drops' recipe accordingly. I like the idea of
adding nutrients to the substrate, and am not confident I could
accomplish this on my own.
BTW, I really enjoyed the 'livley' debate on this topic! Very good way
to really learn about plant nutrition.
Thanks in advance,