"markm75" wrote in message
oups.com...
On Jun 25, 12:27 pm, wrote:
On Sun, 24 Jun 2007 20:14:11 -0700, markm75 wrote:
We have one of those 900 gallon.. 2.5' deep by 16' wide semi
inflatable swimming pools, with an water filter running (8.5 hours a
day after 7pm)...
I'm having trouble figuring out the proper chemicals i should be
buying.. and what that cost probably is per season.
I think you can get by with a floater using tablets and shocking once
a week. You may find liquid bleach is a better "shocker". I use about
200 oz of 10% pool bleach to shock 15,000 gallons so I bet you could
get by with a half pint of regular laundry bleach (5%) .
Watch the pH. In a plastic pool like this it will drop and the acid
will eat up your equipment. In a concrete pool you have the opposite
problem and I end up adding acid. You want it to be the off color
orangy look with the tester, not yellow or pink.
Take your water to a pool store once a month or so and have them test
it, more often if you are having bad results. Just be careful and
"fix" it a little bit at a time. Most people get in trouble by adding
too many chemicals and try to see a change too fast. Less is more. You
can always put more in but you can't get it back once you put it in.
Thanks for all the tips..
Still one question..
So this bag of Shock granuals.. I do this in addition to the other
chemicals correct? (Even though it appears to have some of the
necessary components already in it).. and do so about once a week.. Am
I about right in assuming I need to use about 5% of the bag each week
(for 650 gallons or so, guessing).
I will also have to check out the local pool store to see if they are
indeed helpful in getting the right things, without highway robbing
me 
To balance the pool water use the Langlier Saturation Index
method(S.I.)=ph+TF+CF+AF-12.1.
ph=actual test result.
TF=temperature factor
CF=calcium hardness factor
AF=total alkalinity factor
0=balanced
minus value = corrosive tendencies
plus value=scale forming tendecies
http://www.rhtubs.com/langlier.htm
have fun.