Muriatic Acid Questions

[aginground]

I have been buying muriatic acid at Meijer for two summers now. My Meijer store keeps it towards the very back of the store with the paint supplies. It comes in gallon jugs for $5. Last year it always had a plastic wrapper around the gallon jug (which made it very hard to see what it actually was, unless you knew) this year they do not have the wrapper on them.

[Tomcat]

Check the concentration of that Lowes Muriatic acid. I bought a gallon once, but it was much lower than the concentration of the pool store acid for nearly the same cost. I believe the concentration is given in deg Baume, which is actually the specific gravity, but it's not a one-to-one correlation to % HCL.

All I know is the pool store HCL fumes when opened (hold your breath!) and I need very little to make a difference. The lowes stuff didn't fume and it took a lot more to move my ph.