Re: magnesium oxide source?

"What is a hydroponics store doing with NaOH in such quantities? Plants
do
not need extra Na. That is enough NaOH to provide pH control forever.
KOH
would actually be a nutrient. "
Yeah, i know. Its quite a weird hydroponics store IMO, but they do have
some interesting chems, such as H2O2, HNO3, H3PO4, KNO3, KOH, etc. And
they will kindly order 20KG bags of raw fertiliser for me. :D

.

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