IC-40 Dead???

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Mornin -didn’t see Poolstored’s message till today. Sigh.
I tested anyway and it was at 2. I had enough liquid on hand to get me up to 5.5 (also added some acid to get PH down) and will head to the store today to stock up on chlorine. Will get it up to 7 this afternoon and do the overnight test again tonight.
 
Ugh. Why is this so hard. I just checked my chlorine and it was 8.5. I was at 2 this morning and added 128oz of liquid and according to pool math that should have brought me to 5.5 assuming my pool is 16k gallons. It’s roughly 15x30 kidneyish shaped with a larger shallow end of 3’ and a smaller deep end of 7”. According to pool math my pool would only be 8000 gallons. So confused.
 
Use your pool math. If you don't have it, get it here. Link-->PoolMath
Use "effects of adding" function.
128oz of 10% LC will add 6.2ppm of FC in a 16000 gallon pool.
Your signature also says 16,000 gal?
You have to configure PM to your pool size of 16K
 
Thanks - but that’s exactly what I did! I have 16k in my signature because that’s what the builder put in the paperwork. I’ve tried to use some of the online tools to try and get a better capacity but they usually tell me 20k gallons.
 
I ran your numbers it is about 16K
According to pool math.
128oz of 10% LC will add 6.2ppm of FC in a 16000 gallon pool.
Which is about what happened. You had 2, add 6.2 and tested 8.5.
Your volume is probably about 15,000. (your 6.2 added a bit more).
Start with that volume.
 
Ahhh! I didn't have the % strength of LC in there! Whew - now I get the same thing you did at 16k gallons. I'll drop my volume down to 15k.
Will chime in tonight and again tomorrow morning with the FC results for the overnight.
 
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I was out running errands all morning so I haven't slammed yet. Just tested and FC is 6 and CC is 0

I also pushed the "more" button on the SWG for 3 seconds, the lights flashed and then lit "60%" which I read is the approximate life used on the cell? Not sure if that's worth anything or not.
 
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gonna hold off on the SLAM until I hear back. Checked FC just after sunset and it was 5.5. I added enough LC to get me back to 7. Also, is it normal to be adding as much acid as I am? It's about 32oz every 2 or 3 days. Seems like a lot!
 
If your water is crystal clear with no signs of algae, you don’t need to SLAM.
Gnarbrah said:
Also, is it normal to be adding as much acid as I am? It's about 32oz every 2 or 3 days. Seems like a lot!
Click to expand...
What's your alkalinity? What are you trying to maintain PH level at?

Gnarbrah said:
I also pushed the "more" button on the SWG for 3 seconds, the lights flashed and then lit "60%" which I read is the approximate life used on the cell? Not sure if that's worth anything or not.
Click to expand...
That’s correct. Depending on how much the cell has been abused I’ve seen them die at various usage ranges 80%, 60% etc. What’s your current CYA level?
 
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Thanks for your ongoing help! Pool is clear - see pic below with leaves on the bottom of the deep end for reference...
TA is 88 (is that low?). Trying to stay around 7.5 for the PH.
CYA was at 50 or 60 (I'm terrible at reading that one).
FC was at 8 this morning. I forgot to adjust my pool math down from 16k gallons to 15k before I added LC yesterday.
I'm still feeling not great about my SWG...
ClearPool.jpg
 
Gnarbrah said:
Also, is it normal to be adding as much acid as I am? It's about 32oz every 2 or 3 days. Seems like a lot!
Click to expand...
See below.
Gnarbrah said:
TA is 88 (is that low?). Trying to stay around 7.5 for the PH.
CYA was at 50 or 60 (I'm terrible at reading that one).
Click to expand...
How are you getting a TA of 88? Pool store testing? You need your own ability to test. You have a TF-PRO...report a FULL set of tests from your test kit.
If your CYA is above 50, round up, your CYA is 60.
Your OCLT is ok, chlorinate for a CYA of 60. Link-->FC/CYA Levels
 
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Just ran the full battery of tests with the TF-PRO kit:

FC - 8 (same as this morning!)
CC - 0
CH - 275 (11 drops x 25)
TA - 88 (8 drops x 11)
CYA - at 50 the dot was definitely obscured but really obscured at 40 - this is the one that kills me - according to TFT site you want it to be totally obscured but on TFP I thought read just when it starts to obscure?
PH - 7.8
Salt - 3400

Back to my main concern - what will tell me if my SWG is dead? Looking at the FC/CYA calculator it looks like I need to crank up my CYA? If I do that and the FC doesn't hold (currently set at 80% output and I'm in Central Florida)?
 
Gnarbrah said:
at 50 the dot was definitely obscured but really obscured at 40
Click to expand...
40 or 50 would not cut it for me in NY in the 80s and 90s you currently have going on.

To be extra sure about the borderline OCLT pass before raising the CYA, I would run an overnight *gain* test. With a set amount of hours (9?) we should see X production over night with no UV / algae.

You did not lose FC today........ in Florida. The cell is producing, the question is what is eating your FC.
 
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Thanks as usual! I'll go ahead and run the pump and SWG overnight tonight and test in the morning to see if it goes up.
And - dang I need to wear my reading glasses more often. Just went back and re-read the TA and their example was "11" drops the multiplier is indeed 10.
So my TA is 80.
Assuming my FC shows a gain overnight would you suggest raising my CYA at that point? I see the range recommended is 60-90 so shoot for 70?
 
Gnarbrah said:
I'll go ahead and run the pump and SWG overnight tonight and test in the morning to see if it goes up.
Click to expand...
Get a FC baseline now so we can prove how much it made besides 'more than during the day' :ROFLMAO:

Gnarbrah said:
Assuming my FC shows a gain overnight would you suggest raising my CYA at that point?
Click to expand...
If it shows the gain we expect from your unit overnight, but not during the day, then yes.

If overnight production is mediocre, algae is back on the table and I'd slam.
 

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