So we stopped our pool "service" last week and I'm taking back control. This is a new (to us) pool--2 yrs old. 12,500 gals according to the company that installed the pool. Gunite, in-ground pool with a spa.
We've had problems keeping the pH and Total Alkalinity constant but think I've finally gotten there. Today, pH is 7.4-7.5 and TA is 80. CH is 280. CYA is 60. (We have a Pentair 320 inline chlorinator which does not seem to be dissolving tablets at the moment so I'm going to empty it).
Our biggest problem is chlorine. It constantly measures 0 (both FC & CC). We have had problems with green algae on the south wall which is in the shade. The rest of the pool is in full sun during the day and reaches about 93F. The algae has seemed to have cleared up after the last shock and getting the pH down from 8+.
I started using generic 8.25% bleach 2 nights ago but I'm still getting 0 chlorine when testing. I've also started running the pump at night for 8hrs as well as adding chems at dusk or as soon as everyone is out the pool. The pump is a variable speed and I run at 2750rpms to get a 9gpm flow out the cartridge filter.
Based on what I've read so far, I'd like to target a chlorine level of about 5. The pool calculator says I should add 94oz of 8.25% (which I'm getting from Home Depot for $2.97/121oz). Now, assuming I'm able to get to that level and all the other numbers pan out, does that mean that is how much I should be adding daily to maintain? That will work out to about 6 gals/week or about $75-80/week. Which seems a bit high to me.
Am I missing something?