Am I using too much chlorine?

[Poiks]

Hi all,
I've asked this once before, but although I thought I figured out the issue, I'm still using what seems like an awful lot of chlorine. I'm averaging 46 oz of Hasachlor 12.5% chlorinator per day over the last ten days. The builder estimated pool volume as 14,200 gallons; it's gunite with a pebbletec finish, and is a year old.

• My combined chlorine reading is zero.
• A few days ago I thought maybe my CYA was too low, so I raised it significantly and it is now at 60, but still needs about 44oz of Hasachlor daily.
• My pool is in direct, north-Texas sun for probably 12 hours/day
• I have never seen algae in the pool and I check the chlorine daily
• I keep pH around 7.6 to 7.7
• We have no trees around or other obvious sources of organic matter (then again, I assume the cc of zero rules out organic matter being the issue anyway?)

I don't mind the cost of the chlorine so much--I just want to make sure nothing else is going on that I'm missing.

The only other thing I can think of right now is that maybe the Hasachlor is substandard.

Thanks for any advice.

 

[mknauss]

That is 3ppm FC per day. Very average.

 

[Poiks]

Oh--great! I didn't start managing the pool myself until late summer last year, and at that time the consumption was lower. Thanks for the info, Marty--much appreciated.

 

[lager1829]

It's like a pet, you need to feed it daily. Like Marty said, very average and could go up to 56 oz (4ppm) on high UV days.

 

[mknauss]

Oh--great! I didn't start managing the pool myself until late summer last year, and at that time the consumption was lower. Thanks for the info, Marty--much appreciated.

You bet. In the next few weeks, the amount of chlorine needed each day will start to fall. It will really fall off during September.

 

[Cwiggs]

Right now I've been averaging between 96 and 128oz of 10% bleach a day, I wish I only had to put in 44oz

 

[woodyp]

Count yourself lucky with that loss consdering the temps we've had lately. Down to 65 tonite they say. Go figure.

 

[Poiks]

Right now I've been averaging between 96 and 128oz of 10% bleach a day, I wish I only had to put in 44oz

ha! And I wish I had 21K gallons to work with

 

[Rattus Suffocatus]

I used almost exactly the same amount as you for my same sized or thereabouts pool in September /October last year.. In August with our 110 degree weather we have had, I had to turn up the SWCG a bit, but I figured I would be using closer to 64 oz now. You are in the ballpark for sure. And it will start dropping off now that the days are getting shorter.