why NOT keep a high CYA ?

[aylad]

thanks for the replies.

the issue of "fading bathing suits" is part of my confusion concerning CYA and chlorine. if the CYA causes the chlorine to be less effective against pool nasties, then shouldn't it be equally less effective fading bathing suits ?

since its still able to fade bathing suits i wonder if there are health risks at these higher levels of chlorine ...

thanks
len

I am the one that runs the high CYA levels--I keep it at 80-90......and we don't have problems with faded suits...at least, not so far in 5 seasons.

Janet

[lenhorn]

hit janet.
i looked for your results in the bleach usage survey, but didn't find them.
how much chlorine do you lose / day ?
did you ever keep a lower level of CYA and find that you lost more chlorine ?

thanks
len

[aylad]

hit janet.
i looked for your results in the bleach usage survey, but didn't find them.
how much chlorine do you lose / day ?
did you ever keep a lower level of CYA and find that you lost more chlorine ?

thanks
len

When my CYA is 60 or below, I lose an average of 5 ppm per day, requiring daily chlorine additions. When my CYA is 80-90, which is where I purposely keep it, I only lose about 2 ppm per day, so by staying at the upper end of the best guess chart, I only have to add bleach a couple of times a week, unless I have a really big swimmer load.

Janet

[bryjen]

I got my cya level as of today down to 48. Last year it was between 80 and 90 and i only added chlorine every other day. I am adding daily now so i am going to bring it back up.

[adesalvo]

Doesn't this in effect speak FOR using tri-clor? Tri-chlor is fairly comparable to bleach on price, however, it is simple to use and purchase.

I have been running my CYA at 30 this season and have been using about 3 ppm of Cl. This seems pretty good (I guess) as I have a 25,000 gal IG in full sun and no cover (too lazy) and a very heavy swimming load.

Short of SWG, I would be surprized if I could get away from daily bleach addition.

But, if taking my CYA to 80 (or higher) is the solution, then I am all for it..

[waterbear]

Problem with trichlor is that your CYA will be constantly rising instead of staying stable and that will require higher and higher FC levels to compensate. If you up the chlorine levels using only trichlor you will cause your CYA to rise even faster. Also be aware that CYA levels above about 100 ppm have been found to damage plaster pools.

[aylad]

Doesn't this in effect speak FOR using tri-clor? Tri-chlor is fairly comparable to bleach on price, however, it is simple to use and purchase.

I have been running my CYA at 30 this season and have been using about 3 ppm of Cl. This seems pretty good (I guess) as I have a 25,000 gal IG in full sun and no cover (too lazy) and a very heavy swimming load.

Short of SWG, I would be surprized if I could get away from daily bleach addition.

But, if taking my CYA to 80 (or higher) is the solution, then I am all for it..

Trichlor isn't always a bad thing....you just have to know what you're doing in order to use it effectively. One other thing you need to be careful about if using strictly trichlor is that it tends to drive pH WAY down. My pool wants to run a high pH if left unattended, so it's not a problem for me, but it can damage your pool if it gets too low.

Janet