On Thu, 8 Sep 2011 19:33:41 -0700 (PDT), Frank Foder
wrote:

Went to Lowes today to get the good stuff. They now have only "Klean-
Strip" brand muriatic acid, which has a bright green label that touts
it's environmental safety, and "low fumes". Of course, it doesn't list
the concentration. I figured it was diluted. Indeed, I see from the
web MSDS sheets that this stuff is "25%" HCl, while the normal stuff
is 30%. Grainger seems to sell their own "Green Envy" stuff that's a
pathetic 20%.

The last time I looked at lowe's they had the old stuff and the
'green' stuff. The 'green' was 1/2 the concentration of the
regular.[and twice the price, if memory serves]

I got mine from the pool place, which was about 20-30% stronger than
Lowe's' ''regular'. [OTOH-- it was also about 30% more expensive-- so
I only saved shelf space and convenience]

Jim