PPM --- How do I figure IT

[Cloud26]

Pool is looking better. I put some acid in it sat night and the PH was perfect on Sunday. I didn't do anything to it Sunday. This morning the pool was looking better and is clearing up. I put 4 more gallons of bleach in it this afternoon. I can't wait to see how it will look in the morning.

Thanks for all the help!!!

[Watermom]

You are very welcome. Keep us posted how things are going!

[CarlD]

Figure 15,000 gallons for your calculations...if you have 4' of water the actual number is about 14,700 gallons + or - 14 gallons. But nothing's that accurate and 15,000 is MORE than good enough--makes rule-of-thumb and ballpark calculations easy.
1.5 gallons of 6% bleach adds 6ppm of chlorine to your water. 1 gallon only adds 4ppm. If you buy 12.5% liquid chlorine at a pool store it should add 8.5 ppm of chlorine per gallon.

Carl

[madwil]

just a note- when you are shocking that high, you're pH test is not accurate- higher chlorine (I think over 10) makes the pH read high.
If it's really high, adding acid should be alright, but don't shoot for the low end of pH while your chlorine is over 10...