Quote Originally Posted by PoolDoc View Post
I think you're looking that the chlorine use as excessive, but . . .

1. Chlorine consumption increases with the water temp for a variety of reasons, including chlorine reacting with the CYA

2. It's quite likely your 10% bleach . . . isn't. Try switching to 8% bleach, purchased from Walmart, where it's stored in a air conditioned area. I think there's a good chance you'll find you get more chlorine from the "8.25%" than from the "10%"

Commercial 10% bleach, shipped at 12%, and stored in a pool wholesale warehouse at 100 degrees (Phoenix) for a month, may arrive to your pool at 6%, or even less. Walmart bleach, shipped to AZ a week before purchase and stored in an air conditioned store may arrive at your pool at 9%.

This is why it's NEVER a good idea to 'stock up' on bleach -- it just doesn't keep at high temps.

If you want to lower your CH, it's possible, but messy. If you aren't having problems with your pH bouncing around, and don't have a heater or salt system, you may want to leave it alone.



Thanks PoolDoc. I guess those 7 gallons of chlorine sitting in my garage aren't the best idea! As far as the CH, as I said in my reply to Watermom, the CH in the pool is significantly higher (700) than what comes out of the faucet (200). My pH is not bouncing around, but does seem to need to raise up about .015 a day. Is that excessive?