if you don't want to mail order or drive 5 hours than i suggest BLACK STRAP [UNSULFERED] MOLASSES for your cal/mag.with a ppm of 70 ur gonna need it.ETCH AND WASH concrete cleaner from Lowes or the coop is phosphoric acid....PH down.i live 2 hours S.E. of Memphis.....no good nute source for hundreds of miles but my mail person ain't noisy.why does yours carry a gun??? WTF? have u tried FEDEX?