Quote Originally Posted by KurtV
4 cups of 6% bleach in 2800 gallons of water should increase the chlorine by a little over 5 ppm.
Yep, and that's what it tends to do in practice also.

I don't normally shock the pool just to shock it. I put in 2 cups every evening and it seems to stay nice and clean. If the kids have a pool party or it rains I usually to put in 4 cups. I can't say I've ever had an issue after a pool party, but it does seem that the rain likes to bring on algae, but if I just double the bleach it stays fine and it had (has) been raining about every day here.

TTYL,

Steve