Trouble Maintaining FC Levels
- Thread starter iammikeb
- Start date
- May 3, 2014
- 58,633
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
As I said, technically you passed the OCLT. So no SLAM, but since you just changed out some water and your pool is small, I would suggest raising to SLAM level for a day or two and then do OCLT again. But up to you.
- May 3, 2014
- 58,633
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
You can safely swim in a pool as long as the FC is above the minimum and at or below SLAM level based on your CYA. You must also be able to see the bottom of the pool in the deep end of the pool.
Like Marty said, you did pass, but it wouldn't hurt to bring it to SLAM level and hold it there for a couple of days and give it a good brushing each day.
- May 3, 2014
- 58,633
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
The last CYA you show in Poolmath is 40 ppm. SLAM level for that CYA is 16ppm FC.
Hard to ascertain pool volumes with chlorine additions. Liquid chlorine strength can vary over quite a large span as it degrades.
Hard to ascertain pool volumes with chlorine additions. Liquid chlorine strength can vary over quite a large span as it degrades.
@mknauss yeah, I posted wrong info. Here’s how it should have read (with changes in bold):
I did another 25 mL test a couple of hours after putting in the recommended amount of bleach to hit my SLAM target of 16, and it was at 13.6. The morning sun has also been on the pool for an hour (ish). This would indicate that my pool is larger than the estimated 10k gallons, correct?
I did another 25 mL test a couple of hours after putting in the recommended amount of bleach to hit my SLAM target of 16, and it was at 13.6. The morning sun has also been on the pool for an hour (ish). This would indicate that my pool is larger than the estimated 10k gallons, correct?
- May 3, 2014
- 58,633
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
It might be. Or the chlorine is a bit degraded.
For future reference, review Breakdown of bleach over time by storage temperature
For future reference, review Breakdown of bleach over time by storage temperature
That makes sense. I just bought this bleach this week, but who knows how long it was sitting at the store.
- May 3, 2014
- 58,633
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Bleach/liquid chlorine has a Julian date on the bottles. Look for a number starting with 20XXX or XXX20. The XXX is the number of days into 2020 that the bottle was filled.
I read through this thread - super helpful. I’ll keep sticking with 10% given the heat here in AZ. I have to store my chlorine in the garage which hovers in the low 90’s during the summer days.
@iammikeb So sorry I didnt see your question before about the pump you rented. I had family in town last week/weekend and decided to put the computer away for a bit. I am glad to see the drain and refill was a success!
Hey all, I realized yesterday I never really updated everyone on my results. Well, I will let the photos do the talking. Thanks everyone!
- May 3, 2014
- 58,633
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Very Nice! So now for my shameless request -------
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