New SWG install but vendor recommendations differ from TFP. Advice needed!

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E

eublet

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May 24, 2016
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Mobile, AL
Hey guys, tired of lugging jugs. My old SWG crapped out years ago. Board is fried and company (Polaris Eos) is out of business, so replacing it with a different one. The one I'm going with suggests a CYA level of 20-30 and a chlorine level of 1-3 ppm. The CYA level is much lower than what TFP suggest for SWG pool. What do you think I should do here? The manual states that not following their suggestions can damage the equipment (doubtful I think) and void the warranty.

Thanks in advance!
 
e,

Total bull stuff, it will not damage anything..

We do things differently, that is why our way works and their way does not.

You can't have two bosses, so you will need to decide who you trust the most... :mrgreen:

Thanks,

Jim R.
 
Thanks guys. Following TFP guidelines have never let me down thus far. My initial thought was that the low CYA level would allow the chlorine to be more effective at a low level also, so perhaps it would be easier on the SWG to generate that low amount. But it sounds like you guys think it's the opposite.
 
Think of it like this... the CYA protects the chlorine from the sun. So a pool with a CYA level of 80 requires a FC level of 6, but once it’s at 6 then the pool might only lose 2-3ppm of chlorine per day, so each day the SWG only needs to generate 2-3ppm worth of chlorine.

On the other hand a CYA level of 20 might only require a FC level of 3, but because the CYA is so low the sun will really affect the chlorine and that pool might lose as much as 5-6ppm of chlorine per day. So in that case, even though the FC level is kept lower that SWG would need to produce twice as much chlorine every day in order to keep up with the loss from the sun.
 
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eublet said:
Hey guys, tired of lugging jugs. My old SWG crapped out years ago. Board is fried and company (Polaris Eos) is out of business, so replacing it with a different one. The one I'm going with suggests a CYA level of 20-30 and a chlorine level of 1-3 ppm. The CYA level is much lower than what TFP suggest for SWG pool. What do you think I should do here? The manual states that not following their suggestions can damage the equipment (doubtful I think) and void the warranty.

Thanks in advance!
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Curious, what model did you pick that wants CYA that low? I think Circupool says around 80
 
E,

The key to buying a cell is to make sure it is rated for at least 2 x your pool volume.. In your case I would not go with a cell that is rated less than 40K..

What is your CPM cell rated for???

Thanks,

Jim R.
 

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Jimrahbe said:
E,

The key to buying a cell is to make sure it is rated for at least 2 x your pool volume.. In your case I would not go with a cell that is rated less than 40K..

What is your CPM cell rated for???

Thanks,

Jim R.
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Thanks. I did go with a 40k cell, so hopefully that will do the trick. My pool doesn't have a lot of swimmers in it except for the occasional event, and I don't mind supplementing with bleach in those cases if necessary.
 
eublet said:
Thanks. I did go with a 40k cell, so hopefully that will do the trick. My pool doesn't have a lot of swimmers in it except for the occasional event, and I don't mind supplementing with bleach in those cases if necessary.
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Yes, easy to pour in a half gallon of liquid chlorine after a party. That’s my approach if the pool had a high swimmer load.
 
Still trying to wrap my head around this. If CYA is 70, why is an FC target level of 5 okay for a SWG, but you need 8-10 in a liquid chlorine pool? This is based on the TFP CYA/FC chart. Just not sure why a there are two different FC levels recommended. Maybe it's b/c the FC stays more stable day after day in an SWG pool?
 
eublet said:
Still trying to wrap my head around this. If CYA is 70, why is an FC target level of 5 okay for a SWG, but you need 8-10 in a liquid chlorine pool? This is based on the TFP CYA/FC chart. Just not sure why a there are two different FC levels recommended. Maybe it's b/c the FC stays more stable day after day in an SWG pool?
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This is when it gets fun. See Pool Water Chemistry
What you said in your last sentence is essentially it. Enjoy the reading.
 
LOL, I found that shortly after my last post. Thanks for suggesting it as well!

Love TFP! I am just going to trust the recommendations and do what it says. I can't easily digest most of the things in that thread, nor do I really want to spend the time trying.

I have another 8 lbs of stabilizer to add to get close to 70, so we'll see what happens from there.
 
Quick follow-up here, but adjusted all my numbers based on TFP recommendations, and have been running my SWCG at 25% for 10 hours a day to maintain FC! Granted, water temp is only 80 degrees right now, but still it's been a breeze to maintain. Should have done this 4 years ago.
 
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Brett S said:
On the other hand a CYA level of 20 might only require a FC level of 3, but because the CYA is so low the sun will really affect the chlorine and that pool might lose as much as 5-6ppm of chlorine per day.
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Good point, but you cant loose what you dont have. Just thought it was funny.:laughblue:
 
mguzzy said:
Unless you need 10hrs of filtration you can always bump your SWG to 50%, and reduce the runtime on your pump to 5 hrs.. The CL production should be the same.. and you would save some on the cost of running your pump.. (I'm assuming you have a single speed pump).. just sayin
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Good point, and I have thought about doing this. With the COVID thing happening though, lots of kids are in and out of the pool during the day, so I'm trying to keep it skimmed. Lots of fuzzy stuff in my pool from a nearby flowering tree, so hopefully can reduce it soon. I think I'm going to bite the bullet and put in a variable speed pump though. Should pay for itself in the first 12-18 months in energy savings.
 

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