Chlorine issue

nielsens2001September 2, 2011

I had a new pool built which was completed 7 weeks ago. Last weekend, I shocked the pool for the first time; 1lb of shock for 13k gallons. Unfortunately, I forgot to shut off my inline chlorinator and on Sunday my chlorine levels were north of 5ppm. I then added chlorine neutralizer which brought down the chlorine levels. Since then, i have set my inline chlorinator on a very low setting and have consistently had very high chlorine levels for the past 3 days. Also, this evening I noticed that the grey heads for my Paramount infloor cleaning system are becoming bleached out. Any suggestions?

Thank you for reporting this comment. Undo

Please post your levels for Free Chlorine (FC), Combined Chlorine or Total Chlorine (CC or TC), Alk, pH, CYA (stabilizer).


    Bookmark   September 2, 2011 at 8:03AM
Thank you for reporting this comment. Undo

Thanks, Scott.

CYA 80
TA 80
pH 7.4
TDS 1100
Pho 0

    Bookmark   September 2, 2011 at 3:58PM
Thank you for reporting this comment. Undo

The issues are the level of CYA in the pool and your CC is greater than .5ppm.

CYA helps protect the chlorine from the Sun's UV rays. It does this for both FC and CC though.

The correct FC level is dictated by the level of CYA. Normally, a tablet fed pool needs 8 to 10% of the level of FC when compared to the CYA level. Your FC is a little light.

Your TC - FC = CC, Combined chlorine. It should never be more than .5 ppm. Yours appears to be 1ppm, indicating that you need to shock your pool. Alas, the higher the CYA, the higher the FC needs to be to get to shocking level. Shock is a process, not a product. Please read the Shocking Your Pool section at Trouble Free Pools. I have linked it below.

I expect you will need to do some water replacement. The continued use of tablets will continue to raise your CYA level. The use of Di-chlor powder will also raise youthe CYA level. Use either bleach or 10/12% liquid.

The only way to reduce this is via dilution or a reverse osmosis service, which, AFAIK, only exists in the San Diego area.

You did not list your calcium hardness level.

TDS is a generic term. Its usually mostly salt.


Here is a link that might be useful: How To Shock Your Pool

    Bookmark   September 3, 2011 at 6:55AM
Sign Up to comment
More Discussions
Small 3/4' mosaic waterline tile - mistake?
Hello, We're getting ready to sign our contract, and...
Transition between two DiamondBrite colors
Trying to figure out best way to do this. Will be doing...
Atlantis pool and spa (Magnolia Tx) anyone have any feedback?
Searching for a pool builder and looks like Atlantis...
I would really like to know what kinds of materials...
Resurfacing a Pool
We are looking to resurface our pool. Can you give...
Sponsored Products
Pet Tags Remote Dog Trainer - Black - 72536
$80.99 | Hayneedle
Gama Sonic Posts Pagoda 2-Head Outdoor Black Solar Lamp Post GS-104D
Home Depot
Provo Queen-size Mission-style Frame Cotton Foam Futon Set
Waterproof Daylight White LED Neon, by the Meter
Outdoor Decorative Lighting: Gama Sonic Address Numbers Letters & Plaques
$39.98 | Home Depot
GlideRite 10-inch Solid Stainless Steel Cabinet Bar Pulls (Case of 25)
LED Keeper Holiday Light Repair Set
$39.50 | FRONTGATE
Welles Leather Sofa - Brighton Black Black
Joybird Furniture
© 2015 Houzz Inc. Houzz® The new way to design your home™