Equivalence between pounds of Chlorine in SWCG and liquid bleach?

[nutria]

Can someone help me understand what the equivalence is between a SWCG that can generate say 1lbs of Chlorine in 24 hours and the equivalent amount of "supermarket bleach"? I have searched around but have not found an answer. My circupool Si60 cell appears to be in its last legs and I am trying to figure out my optimal options for replacement. I don't have any type of automation, but I keep my pool open year round so I typically run the cell 24hrs per day on a lower setting and with a minimal flow provided by a VS pump. Also, does any one know if the controller/power supply for the circupool si60 can support a lower rated cell?

Thanks!
Antia

 

[Jimrahbe]

Antia,

In a 16K pool, 1 lb. (16 oz.) of chlorine gas will increase the FC by 7.5 ppm

In the same pool, it would take 182 oz. of 8.25% bleach or 250 oz. of 6% bleach... to increase the FC the same amount...

You can run the numbers yourself by using the pool math link at the top of this page.. Add your pool size at the very top and then scroll to the bottom and use the "Effect of Chemicals: section..

All that said... if your Salt cell is only a couple of years old, something is wrong... It should last way longer than that.. I would also assume it is still under warranty... Why do you believe the cell is bad???

Thanks for posting,

Jim R.

- - - Updated - - -

And why would you want a smaller one???

 

[nutria]

Thanks Jim! So essentially 1pound of CSWG produced chlorine is equivalent to 182 oz (1.42 gallons) of 8.25% bleach. That is perfect, it tells me that my Si60 cell can make the equivalent of 4.26 gallons of bleach per day.

I agree that the cell should not have started to fail after only 2 years, but the fact is, it is failing. It indicates low salt while independent checking shows that the level is fine. I have cleaned (as per the manufacturer's instructions) it and the readings return to more or less the right values and appears to work but the controller still indicates "check cell". After a few days, it stops working again and shows an incorrect salt value. From what I have read, these are classic indications of a failing cell. I will contact discountsaltpool.com, which is where I got the cell, but my understanding is that sometimes the warranty process can be long and I honestly don't have the time to lug jugs of chlorine every day (also, by now I am having to slam because of the failing cell). So, I guess I am wondering if because I run the cell 24 hrs a day 365 days a year I am just going to get a lower lifetime and then I should just opt for a smaller cell and run it at a higher output. This might not make any sense ... but I am just trying to juggle different options.

Maybe I should just be looking at total chlorine production over the lifetime of the cell. In that case I would expect:

10000 hrs of run time at 100% is only 1 year and 52 days. If run my cell at an average of say 40%, that would give me an expected lifetime of just under 3 years. So, overall, it does not appear to be that far off from what one would expect from the specs. Am I completely off base here?

Antia,

In a 16K pool, 1 lb. (16 oz.) of chlorine gas will increase the FC by 7.5 ppm

In the same pool, it would take 182 oz. of 8.25% bleach or 250 oz. of 6% bleach... to increase the FC the same amount...

You can run the numbers yourself by using the pool math link at the top of this page.. Add your pool size at the very top and then scroll to the bottom and use the "Effect of Chemicals: section..

All that said... if your Salt cell is only a couple of years old, something is wrong... It should last way longer than that.. I would also assume it is still under warranty... Why do you believe the cell is bad???

Thanks for posting,

Jim R.

- - - Updated - - -

And why would you want a smaller one???

 

[Jimrahbe]

Antia,

Well, except in the spring and fall when 40% is still way too high of an output and in the winter when the cell does not work at all.. I would think that would increase the lifetime to five years or more..

In theory, a larger cell can run at a lower percentage of output, and should last longer than a smaller cell running at 100% output...

We often recommend Discount-Salt-Pool so everyone hear would like to hear about how your warranty claim goes... Please keep us up to date..

Thanks for posting,

Jim R.

 

[nutria]

Yes, of course you are right. I tend to run it higher in summer and lower in winter and of course there is the Texas winter where things shut down. I am sure I am overestimating the actual effective running times. I will update once I contact the company.

Antia,

Well, except in the spring and fall when 40% is still way too high of an output and in the winter when the cell does not work at all.. I would think that would increase the lifetime to five years or more..

In theory, a larger cell can run at a lower percentage of output, and should last longer than a smaller cell running at 100% output...

We often recommend Discount-Salt-Pool so everyone hear would like to hear about how your warranty claim goes... Please keep us up to date..

Thanks for posting,

Jim R.