On Aug 10, 1:43 pm,
gfretw...@aol.com wrote:
> On Fri, 10 Aug 2012 09:31:41 -0700 (PDT), "
trad...@optonline.net"
> My pool store has 20% in their bulk tanks. (commercial grade)
> The 5 gallons is based on a typical 15k gallon home pool.
>
> That was what it took to clean mine up from the "milky" problem a few
> years ago
>
> I am not sure what you use to test up to 20PPM. Any pool test kit I
> have seen will saturate at 4-5 PPM.- Hide quoted text -
>
> - Show quoted text -
He doesn't need to test up to 20ppm. I just meant
put enough chlorine in so that if it was just pure water
with 0 chlorine he'd end up with 20ppm.
If you want to test to higher levels with the typical
test kit you can take 1/4 pool water, 3/4 bottled
or distilled water. Test it and multiply the result
by 4. Or 1/8 and multiply by 8 etc. For me it's
good enough to see it turn brown with one drop
of test solution. Then you know it's way above
the normal range.
With 5 gallons of 20% chlorine he'd take a 15,000 gallon
pool to 70ppm, assuming nothing eats up some of
it. I probably wouldn't go quite that high,
but putting more in up front is generally agreed to
be better for problems like this than doing a little
at a time. I've heard pros recommend 40ppm for
algae problems. So, I think we're on the same
page. One thing for sure, with a 5 gallons of
12 or 20% chlorine he'd get a lot of chlorine,
shock the hell out of it and it wouldn't cost
much at all.
When I was first learning about pools, one of
the first things I learned was how expensive it
can get when you take a trip to the local pool
store and do what they say. It was "You need
30 lbs of Balance Pack 200", You need 25 lbs
of Super Shock Z, and so it goes. When you
learn what the chemicals are, it gets cheap
fast. Just put two bags of baking soda
totaling 25lbs from Costco in last week.
That cost a whopping $14. At the pool store,
it would be 3 or 4X that.