Pool Math App issue

[sbcpool]

My Pool Math App looks like this:



Note the CSI says "-0.11 today," but when you open CSI it says it's -0.31.



How do I tell which it is? And how do I make those two number agree?

 

[mknauss]

Hmm -- mine is equal. So it something in your data entry. Check to be sure all the data is equal.

I do not see Salt in your Overview. Are you tracking Salt?

 

[sbcpool]

All data I can see are equal. Not tracking salt since I got rid of the SWG.

 

[mknauss]

Then remove the 4800 ppm Salt in the CSI calculation. You may need to enable tracking salt and delete the data point.

 

[sbcpool]

I tried enabling tracking salt and the overview continues to display -0.11. Then I deleted the 4800 from the salt value on the CSI screen and it changed the CSI to -0.02 in the CSI screen, but overview still says -0.11.

 

[mknauss]

Odd. My Overview and CSI screen show the same result. Something is throwing it off.

 

[sbcpool]

I'm just not sure which one is correct. That's my main thing.

 

[mknauss]

I can give you the link to the article CSI is based on, but it is not a trivial calculation.

I input your data into my app where I have Test Pools for use to help members. Inputting the data, and letting the Salt (in the CSI section) equal 1000 ppm which is the default for non-salt pools, I get a CSI of -0.07. So I suspect your Salt level is messing with this somewhere.

 

[sbcpool]

It really is still 4800 (caused by the SWG reporting much, much lower levels) since I did not drain the pool after getting rid of the SWG. If that affects the CSI I should keep it in there.

 

[mknauss]

OK -- did not know that. In my app, that would put the CSI at -0.27

I hope you plan to replace the SWCG. They are the best way to manage chlorine addition to a pool.

 

[sbcpool]

I would like to, but the pad is in a difficult location for electronics as the sun beats on it directly all day and there's no real options for shading it.

 

[mknauss]

Shade cloth? Too bad really. Adding liquid chlorine every day or dealing with the issues of solid chlorine is tedious.

 

[sbcpool]

I would do shade cloth if I could find something to anchor it to. It's hard to explain unless you're there in person.

I'm so used to daily chlorine that I practically sleep walk out to the pool every night and add 1/2 gallon.

 

[sbcpool]

I can't find anywhere with an IC60 in stock anyway. The chlorine jam is causing an SWG jam.

 

[HermanTX]

I input your data into my app where I have Test Pools for use to help members. Inputting the data, and letting the Salt (in the CSI section) equal 1000 ppm which is the default for non-salt pools, I get a CSI of -0.07. So I suspect your Salt level is messing with this somewhere.

Don't meant to hijack this thread but this got my attention. I do not have a SWCG pool so I did not activate that in my PM app. However, I do test for salt every 3 months or so and my salt level is above 1000ppm (about 1400ppm). Should I make a change in my PM app to ensure my CSI readings are correct or adjusted for the salt level due to use of LC?

 

[YippeeSkippy]

On the old web version of PoolMath <which I love dearly> I believe there is a default of 1000ppm of salt unless you change it. Every pool has salt even if not a SWG chlorinated pool.
Could this be part of the problem you're having with the app?

Maddie

 

[mknauss]

If you are NOT tracking Salt, the app assumes 1000 ppm for the CSI calculation.

Salt does not have that great of an effect if +/- a few hundred ppm around 1000.

 

[mknauss]

I can't find anywhere with an IC60 in stock anyway. The chlorine jam is causing an SWG jam.

Pentair IntelliChlor Salt Replacement Cell | IC60 | EC-521105

or, if you do not have Pentair automation, don't mind a non-Pentair cell, and can wait a bit,

APX PERFORMANCE P60 Aftermarket Replacement Salt Cell fits Pentair IC60

Discount Salt Pool has the APX PERFORMANCE P60 aftermarket replacement salt cell that fits a Pentair IC-60 cell (521105). Get the best price with this salt cell alternative.

www.discountsaltpool.com

This is in stock -- IC40 generic

APX PERFORMANCE P40 Aftermarket Replacement Salt Cell fits Pentair IC40

Discount Salt Pool has the APX PERFORMANCE P40 aftermarket replacement salt cell that fits a Pentair IC-40 cell (520555). Get the best price with this salt cell alternative.

www.discountsaltpool.com

 

[sbcpool]

On the old web version of PoolMath <which I love dearly> I believe there is a default of 1000ppm of salt unless you change it. Every pool has salt even if not a SWG chlorinated pool.
Could this be part of the problem you're having with the app?

Maddie

It shouldn't be. No matter what salt levels are being used to calculate CSI, it should be using the same calculations for summary screen as it's using for the CSI screen. Clearly the two aren't using the same code, but I don't have the source so I don't know where the issue may lie.

 

[Texas Splash]

Actually I believe it's the other way around. The newer PoolMath APP has a pre-loaded salt level of 1,000 ppm since virtually all pools will see their salt level increase from the byproducts of other products. No salt at all is not realistic in any pool. @Leebo can correct me if I'm wrong.