I am at 30-40 right now. I try to keep a puck a week in the floater to balance my ph which creeps up up up. I actually like the ph pretty high because the water feels better to me that way. However, I'm being much more careful this year because we are taking off for 10 days at the end of June so I need a margin for the CYA to rise with the pucks I will float while we are gone. Usually, with rain and backwashing I finish the season with CYA of about 50-60 and I have a very manageable bleach consumption the whole summer. I guess I am spending about $5 a week on chemicals on the average.