liner discoloring

pbhound

Well-known member
Jun 25, 2010
51
i have a 24' round pool and the liner has 2 seems on the bottom. well the center section has patchy discoloration where as the two edges are not. does anyone know why this might be?
 

PoolGuyNJ

TFP Expert
May 20, 2007
3,192
South Central NJ
1) Cal-Hypo or dichlor powdered chlorine not pre-diluted well in water before addition can leave powder sitting on the liner.

2) Old liner

3) Cheap Tabs in floater not moving creates concentrated chlorine settling to the bottom and tabs are disolving quickly.

4) Cheap liner.

Scott
 

pbhound

Well-known member
Jun 25, 2010
51
PoolGuyNJ said:
From: Scott

PoolGuyNJ said:
1) Cal-Hypo or dichlor powdered chlorine not pre-diluted well in water before addition can leave powder sitting on the liner.
the only chlorine that gets put into the pool is from the shock pack once a week.

PoolGuyNJ said:
2) Old liner
unless the pool was sitting on the shelf for over a year + then no. purchased pool in april and set up in may

PoolGuyNJ said:
3) Cheap Tabs in floater not moving creates concentrated chlorine settling to the bottom and tabs are disolving quickly.
do not use chlorine products (see #1)

PoolGuyNJ said:
4) Cheap liner.
could not tell you here but its a 25 gauge liner (boulder bay print liner) purchased from rec warehouse in hampton roads VA
 

frustratedpoolmom

TFP Expert
LifeTime Supporter
In The Industry
May 20, 2007
12,177
SWSuburban Chicago, IL
What's in the shock pack that you add once a week (and why are you doing that anyway :)). Are you pre-diluting it, or tossing it in? Active ingredients? You said you do not use "chlorine products" .... then what's in the shock pack?
 

pbhound

Well-known member
Jun 25, 2010
51
i get the ingredients tomorrow when its light out. haha...

but what I'm more concerned with is the way its discoloring. my liner has two seams in the bottom portion and only the center of the bottom is discoloring and its like camouflage.
 

teapot

In The Industry
Jul 25, 2009
574
London and France
Why not stick to BBB as TFP promotes no additives no E numbers just a system that works as proven by thousands of pool owners.

Or do you just prefer doing it your way?
 

pbhound

Well-known member
Jun 25, 2010
51
dmanb2b said:
i finally got pics of the shock that we use and here it is... other than algeacide (that was last used in june) the only chemicals that i have used has been the shock.pool shock


(once i figure out how to post pics straight into the post i will have to continue to link them.)
 

Bama Rambler

Mod Squad
TFP Expert
LifeTime Supporter
Jun 22, 2009
23,036
SouthWest Alabama
No wonder your liner is discoloring.

If all you use is the cal hypo or MPS once a week, your not maintaining a healthy or sanitary pool. You have to have sanitizer every day! Whether it's with a SWCG or by adding chlorine, bromine or bacquacil.

You need to post a full set of test results.

You also need to tell us how you normally chlorinate or sanitize your pool.
 

pbhound

Well-known member
Jun 25, 2010
51
i take a water sample to my LPS every friday and all the tests are in the green, we have a ionizer (that adds copper) instead of chlorine.
 

dmanb2b

TFP Expert
LifeTime Supporter
Apr 4, 2009
3,734
NY
IMO...you should stop using the ionizer...unless you like battling smetal stains and eventually green hair:scratch: Plain old bleach does just fine...and the fact that your test results are in the green, isn't telling us much...toi assist in diagnosing the discoloration. What are the "in the Green" results?

My comment about no pictures related to the actual pool liner...not the bags of shock...sorry about that :oops:
 

PoolGuyNJ

TFP Expert
May 20, 2007
3,192
South Central NJ
pbhound,

Please read Pool School in the upper right. Lets not try taking short cuts or reinventing the wheel.

The discoloring is most likely from how you have been adding the cal-hypo powder.

Liner prints are inked on. It's getting bleached out, like due to not diluting the powder granules. They sink and dissolve when sitting on the print and leaves a very localized and high level concentration of chlorine, breaking down the ink.

Scott
 

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