PPM measure differences, Taylor, Pool store and SWG

MrMike

Member
Mar 10, 2016
7
McKinney, TX
Pool Size
15000
Surface
Plaster
Chlorine
Salt Water Generator
Pool store said 2600
New Taylor kit k-1766 says 3700ish consistently a week apart
Pentair SWG was saying 2800, tech replaced sensor and now says 3050.

Taylor kits creates some 'chunks' when mixing drops. Is this normal/expected? I'm wondering if the kit is bad?
I read SWG measures aren't very accurate, +-500ppm??

Just run with it, replace k-1766 or ask pentair to check swg again?

Thanks.
 

jeffchap

Bronze Supporter
TFP Guide
Jun 26, 2012
2,136
Edmond OK
Pool Size
27500
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Drop tests are generally more accurate than digital testers. But as long as your SWG isn't complaining about low salt and is making chlorine, don't sweat it too much.
 
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MrMike

Member
Mar 10, 2016
7
McKinney, TX
Pool Size
15000
Surface
Plaster
Chlorine
Salt Water Generator
I was worried it may get worse and/or require more salt than normal to operate. I read it's more efficient with actual higher ppm. Would that effect overall lifespan either way, or is it a total # output over the cells life regardless?
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
35,207
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Believe your Taylor K-1766 salt test.

Be skeptical of all pool store tests.

SWG salinity reading can be off due to temperature thermistor in cell being off. Never add salt based on cell reading.

3600ppm is optimum level for IntelliChlor. The Taylor test says you are there.
 
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jedigrover

Gold Supporter
Sep 13, 2010
296
Plano, TX
Pool Size
21000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Hayward Aqua Rite (T-15)
I never trust the SWG. Especially since mine is a Hayward and doesn't have a separate conductivity sensor.
I check the actual salt level 2 ways:
- Most often, I use a salt meter, specifically this one: https://smile.amazon.com/gp/product/B01BXDTSXW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
- I occasionally (once a month) cross-check the meter's reading with the Taylor K-1766 test.
- About every six months, I also check the meter against a 3000ppm standard saline solution. In 2 years, I've not had to re-calibrate the meter. It is spot-on with the Taylor test.

I had the meter and the standard solution to check calibration before I got the Taylor test (mostly out of curiosity to see if there was a difference).
The meter is much, much faster than the Taylor test and also gives me the temp of my water sample, which is handy for plugging into PoolMath.
The Taylor test is a good reference, but it takes a lot more time to run.
Yes, the Taylor test makes a precipitate. I found it leaves a ring in the vial & I have to clean the vial.
 
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Jimrahbe

Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
25,984
Bedford, TX
Mike,

Your salt cell has an accuracy of +/-500 ppm. It is more of a guess than an actual salt reading. If it reports anything close to the actual salt level be happy.

The Taylor kit is +/- 200 ppm. The chunks are normal. Are you using a smart-stir or similar device? If not, it makes it much harder to be accurate. When using the Taylor kit, and the speed stir, as you approach the actual level, you will see the color flash to brown, and then it will immediately go back to milky. The very first time it changes color and stays that way, you stop counting.. Unlike some other tests, you do not keep trying to get the color darker.

The Pool Store is like rolling dice, every roll is almost always a different number. :mrgreen:

Thanks,

Jim R.
 

MrMike

Member
Mar 10, 2016
7
McKinney, TX
Pool Size
15000
Surface
Plaster
Chlorine
Salt Water Generator
It turned a little orange on 18th drop, then full turned salmon red on 19, so I assume it in the middle-ish level between 18-19.
I'm just swirling the tube, so no stick. Instructions just says to swirl.
 

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