SWG Run Time Calculator

GeoQuack

Active member
Sep 4, 2016
29
Melbourne, Australia
I like your calculator. How accurate do you find it, as temperature and pH have a significant effect on swg output?

It makes me glad that I oversized my swg when I replaced it recently. I can generate 21.6 FC over 24 hours, which would probably be enough to keep the chlorine at SLAM levels.

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KarenNJ

Well-known member
May 7, 2017
299
Northern NJ
I need to figure out what is going on because my generator should be able to keep up with the chlorine loss at 75% for only 4.5hrs but I have been running it at 8hrs on low and it is not holding it. Is this assuming pump running on high or does that not matter?
 

kcindc

Gold Supporter
LifeTime Supporter
TFP Guide
Sep 2, 2011
1,299
Fairfax, VA
I need to figure out what is going on because my generator should be able to keep up with the chlorine loss at 75% for only 4.5hrs but I have been running it at 8hrs on low and it is not holding it. Is this assuming pump running on high or does that not matter?
I see you have a new pool, new SWG and many different threads with lots of different questions. Did you ever get the CYA test finalized? If so, what are those results?

How much FC are you loosing a day? Your SWG is sized right, so it might be a matter of adjusting your CYA, run time and %.

Normally, SWG work just as good when the pump is on low. Have you checked the SWG lights when you are running the pump on low?
 

JamieP

Platinum Supporter
I need to figure out what is going on because my generator should be able to keep up with the chlorine loss at 75% for only 4.5hrs but I have been running it at 8hrs on low and it is not holding it. Is this assuming pump running on high or does that not matter?
Just a thought, but sometimes the SWG will not generate chlorine if the flow is not high enough. Not sure if this would be the problem in your case though.
 

RoxxW

Well-known member
Dec 14, 2016
128
Poquoson, VA
Re: Formula for SWG / Pump Runtime?

Is there a working link to this tool?

Great, thanks.

Here is the latest. Anything that I am missing? Obviously, the most difficult part is the PPM loss. I would think this could be measured over several days or a week and average it out. This would have to be done without the SWG running. Even that might not be right since there are alot of factors but it should be a decent starting point. Otherwise, maybe start with a value on the high side such as 3 or 4 and then back down from there.

If you want to download and take a look, here is the link: https://www.dropbox.com/s/xbrx61honuuu3jm/SWGCalculator.xlsx?dl=1

View attachment 51831
 

domct203

Bronze Supporter
LifeTime Supporter
TFP Guide
Jun 3, 2015
3,959
CT
I found that chart not very close for my pool. Chart said 12 hours 60%. My chlorine was climbing daily. I'm down to 8 hours at 35%
Then you must need less FC ppm than you thought per day. Not the charts fault.