Quote Originally Posted by amyinraleigh
How many 3" pucks should I use? Can I put too many, and if so besides raising CYA what would too many do to my pool?
Amy,

Chuck's advice is a good "better safe than sorry". I'm glad he mentioned it though I don't think you'll be running out of chlorine nor getting algae.

I can't find in any of your posts where you said how many gallons of water you have in your pool. I'd need to know that to tell you how many pucks to use and what the effect would be. As an example, one 3" Tri-Chlor puck adds 2.54 ppm of chlorine and 2.1 ppm of CYA into my 16,000 gallon pool and lowers the pH by 0.07 (when the TA is 110). If you use too many pucks, you will have more chlorine (not a problem), lower your pH more (could be a problem if it drops too much), and add CYA into your pool (only a problem if this were a lot). I wouldn't worry at all about the amount of chlorine and even CYA you will be adding to your pool. It's really only an issue if you use pucks all summer long. I'd be more worried about the effect on pH which is why we recommend beefing up your alkalinity level (TA) and starting with a higher pH to somewhat reduce that effect.

I wouldn't worry too much about this. For 10 days, just throw in 3 pucks in a slow flow feeder and I think you'll be fine unless your pool is much larger than mine. Just start out with your pH at 7.7 to play it safe.

Richard