Pool wont hold chlorine

[Maestro]

In your 13k pool, the T-9 should be able to produce 6.5ppm of FC in a day. The T-9 claims to produce 0.7 pounds of chlorine gas in a day.

How do you calculate the daily chlorine production in ppm? I have a T-15 cell and a 22K gallon pool. Hayward's specs (thanks for the link, bobandsherry!) says it will make 1.47 lbs/day. What do I do next?

 

[bobandsherry]

Maestro - I created a spreadsheet to calculate production as I wanted to understand just what the SWG was producing. Putting in figures for your pool specs I show 8.0FC per day at 100% output. From there it's all linear as to changing the run time and/or output.

FYI, you can also use the Pool Math calculator here in TFP to see the effects. Put in the # of gallons of your pool and then scroll down to the bottom where it shows "Effects of adding chemicals". 1.47lbs = 23.52 oz (chlorine gas), shows "raise FC by 8, lower pH by 0.67, and raise Salt by 6.6" for your pool size.

 

[Maestro]

Maestro - I created a spreadsheet to calculate production as I wanted to understand just what the SWG was producing. Putting in figures for your pool specs I show 8.0FC per day at 100% output. From there it's all linear as to changing the run time and/or output.

FYI, you can also use the Pool Math calculator here in TFP to see the effects. Put in the # of gallons of your pool and then scroll down to the bottom where it shows "Effects of adding chemicals". 1.47lbs = 23.52 oz (chlorine gas), shows "raise FC by 8, lower pH by 0.67, and raise Salt by 6.6" for your pool size.

Thanks, bobandsherrry. After I wrote, I realized the math is pretty straightforward. 22K gallons of water x 8.34 lbs/gal = 183,700 lbs., and 1.47 lbs. chlorine/183,700 x 1million = 8ppm.

Now I'm curious about the effect of chlorine adding salt to the water, but I'll stop highjacking this thread and start a new one. It's a shame that the new app doesn't show the related effects of the chemicals like the web version does. Perhaps in the next update...

 

[jblizzle]

I raised my chlorine to about 13 before nighttime so I could do the OCLT. Then we got hit with a nasty storm and tons of rain. Will this throw off my test if I test for chlorine? My water level has risen big time.

That could certainly impact the OCLT due to added debris and water.

 

[BattleOfYakima]

There was a quote like, "if you can't trust the results of your OCLT, it is invalid and you have to redo, but if it was done right and you have no reason to doubt it, and you passed, then you passed and no need to redo"
Additional info about rain and OCLT: https://www.troublefreepool.com/threads/145496-Where-is-my-chlorine-going?p=1287367&viewfull=1#post1287367