Just out of curiosity......does anyone have any idea how much FC could be "consumed" after heavy rains sweep over a screened in pool enclosure? I'm talking about 2+ inches bringing in God knows what trapped on the screens over the pool. I still think that may be what lowered my FC below target and allowed further contamination. I only run my chlorine generator about 9 hours per day. This time of year I may have to re-think that. Maybe add some time overnight. And no, I don't have a VS pump. Maybe someday.
SWG chlorine levels
- Thread starter fishing
- Start date
Hard to say. You can always supplement with bleach to bump the FC level and not fully rely on the SWG.
Update. It appears that my previous slams were sloppy and/or impatiently done. I have been able to hold a FC level of 6-8 despite the massive amounts of rain we've been getting. Now it's down to fine tuning my cell percentage and run time.
Just another update. I am a little surprised. It seems my FC demand is around 5. I'm running a single speed pump at 10 hours a day at 75% cell output. At least this time of year. It's a small pool-10,000 gal. And bather load isn't much. Glad I got the T-15.
Sorry, another update. Water started to look a bit cloudy. I don't see any algae on walls or in corners. And I brushed, vacuumed, and cleaned the filter. Never saw clouds of debris. FC never got below 4. But it was evident the salt cell was struggling to keep up as I was adding both run time and percentage. Here's a breakdown:
Last Sat evening FC-7
Sun morn FC-6
Mon morn 5.5
Tue morn 4.5
Adjusted percentage up
Wed morn 5
Thur morn 4.5
Thur night 6.5
Adjusted run time up
Fri morn 4
Added 24oz of bleach to get level up
Fri night 6
Sat morn 3
These results are from noon Friday:
TA 80
CH 350
CYA 70
FC 5
pH 7.2
I never see CC above 0.5. Any ideas why the SWG isn't keeping up?
Last Sat evening FC-7
Sun morn FC-6
Mon morn 5.5
Tue morn 4.5
Adjusted percentage up
Wed morn 5
Thur morn 4.5
Thur night 6.5
Adjusted run time up
Fri morn 4
Added 24oz of bleach to get level up
Fri night 6
Sat morn 3
These results are from noon Friday:
TA 80
CH 350
CYA 70
FC 5
pH 7.2
I never see CC above 0.5. Any ideas why the SWG isn't keeping up?
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Because once it starts growing, the normal FC levels will not stay ahead of its reproduction.
check you pH. Get that square, and make sure it is stable w/ baking soda (test). then i have my chlorine in there. ..when it's hot, i'll just dump a gallon of Mur Acid in at least every week, i've measured it enough to know that it will need it. I do an "audit" measure every so often, but it is always about what i figure it is.
Do me a favor, turn the SWG on at 100% write down all of the diagnostic numbers. Turn the SWG switch off and then back on and after the click write down all of the diagnostic numbers again and report them here.
Did the pool pass the OCLT this last SLAM?
Did the pool pass the OCLT this last SLAM?
Last you said: your slams have been sloppy.
So have you fully completed one yet and passed the 3 criteria to stop.
So have you fully completed one yet and passed the 3 criteria to stop.
Yes. The ones prior to the last one had been sloppy. This one passed all three tests.
like ping said (btw, great user name), check the numbers. if your cyanuric acid gets too high, you can have problems with your chlorine being effective..anybody else think that? need to jump in my pool in a bit..85 water temp!
Exlonghorn
Gold Supporter
- Jun 16, 2019
- 119
- Pool Size
- 18000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Jandy Truclear / Ei
Yeah from the Chlorine/CYA chart, 3 is the minimum FC level for SWCG pools. Target is 5. Might have just been skirting the edge a bit too much.
www.troublefreepool.com
SWCG Pools
The Free Chlorine and Cyanuric Acid Relationship
Managing your cyanuric acid and Free Chlorine levels is key to stabilizing your pool. Learn how these two items affect each other.
www.troublefreepool.com
SWCG Pools
| CYA (Stabilizer) | Minimum FC | Target FC | SLAM FC |
| 60* | 3 | 4 | 24 |
| 70 | 3 | 5 | 28 |
| 80 | 4 | 6 | 31 |
Sorry, another update. I have played around with my FC levels for the past month. It seems I'm able to hold 13 with no trouble. Once I creep down to the 10 level things start going south. I have a suspicion that a cracked glass block in my spa spillover (I hadn't noticed before) might have some algae in it. It's an extremely small crack, but it doesn't take much. I'm going to keep this level until (if) I can get the block replaced. Then I'll mess with it again.