To help with your 'Bleach' Calculation I've copied a portion of the sticky posted in the Pool chemical section. Figure out where your pool is on the 'Best Guess' guide that Mbar posted and then adapt your pool size to the calculation below:

Bleach for chlorine--regular or ultra unscented. 1 gallon of regular bleach, with a 5.25% concentration will add 5.25ppm of Free Chlorine (the good stuff--FC) to 10,000 gallons of water. 1 gallon of Ultra at 6% will add 6ppm of FC to 10,000 gallons of water.


My math isn't the best but given that 4qt(1gal) bleach at 5.25% will raise 10,000 gal of water to 5.25ppm fc, I think 6qt will move 15,000 gal the same (5.25ppm fc). For maintenance purpose, I think you can use the same math, and divide it in half for maintenance, like this. 3qt will give you about 2.5 - 3.0ppm,

To make things easy for myself, I bought a 2qt plastic pitcher, and marked it at the '2 cup', 1qt and 2qt. I found this helped a lot and makes the dosing pretty easy. Keeping your chlorine at the right level is a must and MAY include adding bleach daily. I think one of the keys is to get your CYA level to a point that your FC holds at your desired level between dosing so that dosing is convienent. As an example, my CYA is about 15-20 and it appears to be holding my FC till I add a maintenance dose of anywhere between 2 cups to 1 qt at the end of the day. The SUN/Temp/pool use affect the amount I need to use to keep my pool at sanitation level.

re: Sequestering Agent - I would suggest adding 'Sequestering Agent' every time before you bring your pool to shock level to avoid staining. You might even need to add a little more after you shock to remove fresh stains.

I don't have any comments on the Clarifyer because I have only used it a few times but didn't see any real gains. So according to me the jury is still out on the value of 'Clarifyer'.

Hope this helps.



Quote Originally Posted by jcarroca View Post
I added 2 gallons of 6% bleach waited 2 hours and there was no staining. I added an additional 3 gallons today and hope there will be no staining. Is metal sequestering going to have to be part of routine maintenance for me?

About 6% bleach, how many gallons are required to shock a 15k size pool. Do people ussually add bleach daily? What is a maintenance dose, 1 quart or 2.

The pool water is still a little cloudy, should I use a clarifier. Thanks for all of your help.