Quote Originally Posted by CarlD View Post
No, but close! Good for a newbie! 2 gallons of 6% will add 4ppm of chlorine to your 30,000 gallon pool, not 5ppm. ! gallon of 6% add 6ppm to 10,000 gallons, therefore 1/3 that to 30,000 gallons or 2ppm. 2 gallons therefore adds 4ppm.

Aim for a shock level of 15ppm. 7 Gallons of 6% bleach should do it. Current FC: 1ppm. 7gal adds 14ppm, which equals 15ppm.

Just my "take"

Carl
my mistake, i forgot to edit my first post. I took measurements and believe my pool is 25,000 gals...so 6.5 gals should get it there? Do I need to adjust the CYA level since the chlorine seems to be getting used fast or leave it where it is? How soon after adding the shock dosage should I test? and am i correct for shocking due to not knowing how the previous pool owner left the water condition?