How Hard is your SWG Running During the Summer Heat?

RexO

Well-known member
May 24, 2020
54
Melbourne, FL
In Florida, my iChlor30 is running at 80% for 11 hours daily to maintain 5-6 FC @ 70 CYA. Typical for the summer heat?
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
44,321
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
That is 4.4 ppm FC being added to the pool each day. In your climate, might be a bit high, but not terrible. It is about what I see this time of year, but our UV impact is higher.
 
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RexO

Well-known member
May 24, 2020
54
Melbourne, FL
How much sun does your pool see a day? Is it in full sun all the time? That will have a bearing too.
Southern exposure. The only big trees around are in the neighbors' yard, so it gets plenty of sun. Only relief is the typical clouds and thunderstorm in the afternoon.
 

RexO

Well-known member
May 24, 2020
54
Melbourne, FL
How's your water quality?

If you're concerned, you could do an Overnight Chlorine Loss Test to be sure that you don't have any water issues and your chlorine usage is only to the sun.
I am pretty much nailing the TFP recommendations. Water is crystal clear. I recently raised FC to SLAM level because of a toddler event in the pool, but didn't do a proper OCLT. I mean I have tested late in the day and again in the morning but not according to strict OCLT procedure. I could do that for peace of mind.
 

RexO

Well-known member
May 24, 2020
54
Melbourne, FL
I am pretty much nailing the TFP recommendations. Water is crystal clear. I recently raised FC to SLAM level because of a toddler event in the pool, but didn't do a proper OCLT. I mean I have tested late in the day and again in the morning but not according to strict OCLT procedure. I could do that for peace of mind.
This morning: pH 7.8. FC 6. TA 90. CYA 70. CH. 350. I added 1 cup of MA. Normally I like to at TA 70, but just added some baking soda yesterday.
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
44,321
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Adding baking soda and acid is a chemical hamster wheel. Let your pH rise to at least 8 before adjusting it down to 7.6. Let TA fall to as low as 50 ppm and see if things settle.
 
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jark87

Silver Supporter
Jun 5, 2011
512
Flower Mound, TX
Pool Size
25500
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Jandy Aquapure 1400
I’m in the Dallas area, so we’re probably in a similar climate to yours. I used to have to run at 80% during the hottest part of the summer. After adding a chiller, I tend to max out at 35% now. Part of that is I’ll run the pump longer since the best cooling is during the wee hours. But I wonder if a lower water temp helps some. Water temp used to get to the mid-90s (yuck!) and now I can keep it in the low to mid-80s.
 
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RexO

Well-known member
May 24, 2020
54
Melbourne, FL
I’m in the Dallas area, so we’re probably in a similar climate to yours. I used to have to run at 80% during the hottest part of the summer. After adding a chiller, I tend to max out at 35% now. Part of that is I’ll run the pump longer since the best cooling is during the wee hours. But I wonder if a lower water temp helps some. Water temp used to get to the mid-90s (yuck!) and now I can keep it in the low to mid-80s.
I was wondering about heat vs just sunshine too. My pool has been as warm as 93 so far. But with daily afternoon showers this week it peaks at 89.
 

Kjp300

Gold Supporter
Jul 18, 2018
179
Canfield ohio
When the cover is open all day and the kids are swimming I have to run mine at 100% for 12 hours which puts in a little less than 4 ppm. I then lower the setting to 30% at night. Now here in Ohio we have had 90 degree days with full sun recently. Last year not one day in the summer reached 90.

I run my filter 24/7 (I know not TFP recommended) I find that I am losing 4-5ppm per day on the hot days. But my pool gets a ton of use. Grand kids live next door and all of their friends are here swimming. If he pool is covered and doesn’t get use I can run it at a lower percentage. I have found with an auto cover it is difficult to set the SWG at one setting and forget about it. I have to adjust it based upon usage and how much the pool is covered.

With the cool summer last year I was fine with my CYA at 50. This year I am at 50-60 and will probably raise it to 70.
 

RexO

Well-known member
May 24, 2020
54
Melbourne, FL
That is 4.4 ppm FC being added to the pool each day. In your climate, might be a bit high, but not terrible. It is about what I see this time of year, but our UV impact is higher.
How do I calculate the ppm added daily in the poolmath app?
 
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