1. ## Calling all mathematicians

Hey all, need some help figuring out how much ppm chlorine my SWG produces. I have it set at 40% for 18 hours a day, Jandy 1400 producing 1.25 pounds of chlorine in a 24 hour period. Any help will be greatly appreciated.

2. ## Re: Calling all mathematicians

Input 1.25 of chlorine gas in the Effects of Adding Chemicals section at the bottom of PoolMath, be sure your pool volume is set at the top. That is the ppm the SWG would generate running at 100% for 24 hours.

Take that and multiply by it (18/24)*0.4 or *0.75*0.4 or *0.3 ... so you are currently adding 30% of the total capacity.

BTW, there is no reason to be running your pump that long. I would double the SWG output and only run for 9 hours. See Determine Pump Run Time.

3. ## Re: Calling all mathematicians

Jason got you covered. based on your numbers you have, in pool math, you are adding 6 oz of chlorine gas, which is around 3.5ppm per day. sounds about right.

i also agree that you can decrease your pump run time. just compensate the % to get the same output

- - - Updated - - -

Jason got you covered. based on your numbers you have, in pool math, you are adding 6 oz of chlorine gas, which is around 3.5ppm per day. sounds about right.

i also agree that you can decrease your pump run time. just compensate the % to get the same output

4. ## Re: Calling all mathematicians

Thanks for the responses. Pool temp today reached 93, ready to make chicken soup lol. My pool gets full sun 12 hours a day. I will adjust the pump run time down and see how it goes.

5. ## Re: Calling all mathematicians

Type in the following into Google:

0.4*1.25 pounds per 24 hours per 13000 gallons in milligrams per liter per 18 hours
and you will get

3.45653156 (milligrams per liter) per (18 hours)

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