Gallons of muriatic, days of aeration...

[mwsmith2]

that's why I said to shoot for 6.8 by adding acid in small amounts and testing until you got there.

Regardless of how small of an amount you add, when you are at the bottom of the scale, you can be past 6.8 and not know it, hence my caution.

Michael

[Watermom]

I agree with Carl and Michael. Stop at 7.0. If your kit says 6.8, it could actually be lower than that.