On Thursday, August 4, 2016 at 9:15:26 PM UTC-4, David Jensen wrote:
On Thu, 4 Aug 2016 17:05:39 -0700 (PDT), trader_4 wrote:

mixing with equal part water will give typical household bleach
concentration.

I was diluting 2 parts HASA with 1 part water but I was just guessing based
on a pool calculator which said that 1 gallon of 6% household bleach gave a
given pool 1.6 parts per million free chlorine as compared to a gallon of
HASA 12.5% pool chlorine which gave that same pool 3.2 parts per million of
free chlorine.

Since 1.6 goes into 3.2 twice, I was mixing 2 parts of HASA to one part
water, but I wasn't sure if that was correct.

Do you think it should be 1:1 HASA to water or 2:1 HASA to water to mimic
bleach?

Look at it this way. Whatever good stuff that is in that gallon,
if you add water so it's two gallons, then you'll have the same
good stuff in twice as much water, making it half the strength
that it was.