Is this correct? (Shock process)


Jun 6, 2015
Los Angeles, CA
Hi there!
I'm currently shocking my pool (16,500 gal/ pebble). CYA is at 50. I've been maintaining shock level at 16ppm, but I'm literally on my 7th day and still losing about 2ppm each night. Filter running continuously - except for about 1/2 hour yesterday so I could clean out the filter cartridges. Any ideas ? Should it really take this long? I've been through about 8 gallons of (Home D) 10% bleach.
Thanks for any help in advanced, and hope everyone is safe out there.
John M.


TFP Expert
LifeTime Supporter
Jun 12, 2009
NW Ohio
Pool Calc is not a TFP product, PoolMath is.

If that was just a typo and you are using PoolMath, then you must have your CYA set to 40 somewhere. SLAM level is 40% of your CYA level, for a quick sanity check.