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One More Thing About Actinic Lighting

I forgot this on my last post, so I'll make it quick.
In a recent message, James Purchase discussed a book
that stated actinic light can break down iron into a
form more usable to algae.  While I was talking to
Greg Morin of Seachem on the phone awhile ago, he
mentioned how gluconate bound minerals are either used
rapidly by plants or precipitate.  It would seem to me
then, that unlike iron edta (for example), gluconate
complexed elements are not in the water long enough
for the any actinic light to perform this dirty deed. 
If this doesn't make any sense, it's because I can't
sleep (but I'm still really tired).  Later all.   
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