Yes... here's another newbie with a pool

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JBrooks said:
Yes I measured CC this morning and it's zero. Adding the 5 drops didn't turn the water pink at all.

I'll talk to the pool builder. I have no idea what they were putting into it for the first 4 weeks. One day I called them because the water was really cloudy. They came out the next day and treated it with something that made it clear again almost immediately. I think it was a powder of some sort because I didn't see any jugs of liquid chlorine.

I know they just added several bags of salt 1 week ago and I measured 3200 ppm this morning.
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I wonder if they used Green to Clean. Green to Clean has ammonium sulfate in it - I've never used it but I understand that it does clear the water quickly, albeit by adding said ammonium sulfate. This would likely leave some ammonia in the water, no? The ammonia would then deplete both your CYA and chlorine - both of which seem to be getting consumed here.



m.
 
mknauss said:
Ammonia is the result of the CYA being consumed by bacteria. Ammonia does not consume CYA.
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Like I mentioned elsewhere, when I hang out in the pool groups on Facebook I feel like the smartest guy in the room. Then I wander over here and I'm quickly cured of it!



m.
 
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TheDeuce said:
I wonder if they used Green to Clean. Green to Clean has ammonium sulfate in it - I've never used it but I understand that it does clear the water quickly, albeit by adding said ammonium sulfate. This would likely leave some ammonia in the water, no? The ammonia would then deplete both your CYA and chlorine - both of which seem to be getting consumed here.



m.
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Entirely possible but I have no idea, since they haven't replied. I know they're really busy but I suspect they've just moved on to the next customer since they already received my last payment. If they do get back to me, I'll let you know.

How long would that last in the pool? I haven't tested today because it's been raining all day. I've had a hose connected to the pump drain and it's been draining for over 9 hours but the rain keeps filling it up. It's crazy. Hopefully I can retest tomorrow.
 
mknauss said:
Ammonia is the result of the CYA being consumed by bacteria. Ammonia does not consume CYA.
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That said, I knew I'd read, somewhere, that disappearing CYA was a symptom of the presence of ammonia. I did some reviewing and found this:


What are the Signs that Ammonia is in Pool Water?​

  • Disappearing CYA
  • High CC
  • Low ph
  • Inability to hold chlorine level

Ammonia - Further Reading

www.troublefreepool.com www.troublefreepool.com


So does my point not still hold water (pun kinda intended)? By whatever mechanism the OP's CYA was being depleted and he couldn't hold his chlorine level.




m.
 
JBrooks said:
Entirely possible but I have no idea, since they haven't replied. I know they're really busy but I suspect they've just moved on to the next customer since they already received my last payment. If they do get back to me, I'll let you know.

How long would that last in the pool? I haven't tested today because it's been raining all day. I've had a hose connected to the pump drain and it's been draining for over 9 hours but the rain keeps filling it up. It's crazy. Hopefully I can retest tomorrow.
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Here's the TFP write up on ammonia:

Ammonia - Further Reading

www.troublefreepool.com www.troublefreepool.com


I hope Marty or one of the other experts weigh in since I'm not at their level of expertise but I can't help but notice that you have all of the symptoms of ammonia, even if my understanding of the relationship between disappearing CYA and ammonia was flawed. Looking forward to learning!



m.
 
I wanted to lower my PH because it went from 7.8 to 8.0 and seems to be rising. According to the pool calculator, I need to add 11 oz (1 cup, 3 oz) to lower my PH from 8.0 to 7.6. I started by adding 1 cup. When I tested PH again the next day, it was still at 8.0. So I added another 1 cup. When I tested again the next day, it was still 8.0. This went on for a few days before I noticed any change in PH, where now I'm sitting at about 5 cups added so far and it still isn't at 7.6 yet.

So my question is why is the pool calculator off by so much? My pool size (10,900 gallons) came from my PB, so it should be accurate. We've had a lot of rain, but I've heard that if anything, rain could lower PH. Am I missing something?
 
What is the TA? Is the acid strength you selected in the app the same as you were using for the pool?

Most rain raises pH due to aeration. That may not be true with a shelter over the pool like you have.
 

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mknauss said:
What is the TA? Is the acid strength you selected in the app the same as you were using for the pool?

Most rain raises pH due to aeration. That may not be true with a shelter over the pool like you have.
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I just measured the TA and it looks like 90. The 25 ml sample changed from green to a very light pink at 9 drops, then a dark pink at 10 drops. So maybe 95?

Yes the acid strength I chose in the app matches the acid I'm using. I double checked that as well. It's 34.45%.

The pool is just screened, so water can still enter. It mostly just keeps the bugs and leaves out.

For the most part I think I have things dialed in well, but it's just odd that the calculator has been off so much as far as how much chlorine and acid to add.
 
mknauss said:
100

The app is just a calculator. The data that is put into it is what shapes the results you get. So pool volume, test data, etc effects the results.
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So do you think my pool volume is incorrect? Even with a TA of 100 in the pool calculator, the suggestions are off.

Is this a common problem with other people, or is it just me? If it's just me then I need to figure this out.
 
JBrooks said:
So do you think my pool volume is incorrect? Even with a TA of 100 in the pool calculator, the suggestions are off.

Is this a common problem with other people, or is it just me? If it's just me then I need to figure this out.
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I believe I have read a new plaster built pools have a constant Ph rise. Some one here can comment how much.

but if the other items seem to be right with pool math additions, I wouldn’t stress it.
 
Dabrodas said:
I believe I have read a new plaster built pools have a constant Ph rise. Some one here can comment how much.

but if the other items seem to be right with pool math additions, I wouldn’t stress it.
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The only things I've tried to adjust so far: chlorine and PH (acid) and both quantity suggestions have been way off. That's why I'm thinking either my pool size is incorrect, or something is going on with my pool: meaning chemicals are being affected by something else such as something the PB added or new plaster as you suggested.

I had to add 4 gallons of liquid chlorine to increase from 0 to FC 10, and 5 cups of acid to bring PH from 8.0 to 7.6 (it did finally reach 7.6 last night). The recommended doses in the calculator were about 1/5 of those amounts.

I guess I'll just continue to monitor everything and hopefully it will even out.
 
JBrooks said:
The only things I've tried to adjust so far: chlorine and PH (acid) and both quantity suggestions have been way off. That's why I'm thinking either my pool size is incorrect, or something is going on with my pool: meaning chemicals are being affected by something else such as something the PB added or new plaster as you suggested.

I had to add 4 gallons of liquid chlorine to increase from 0 to FC 10, and 5 cups of acid to bring PH from 8.0 to 7.6 (it did finally reach 7.6 last night). The recommended doses in the calculator were about 1/5 of those amounts.

I guess I'll just continue to monitor everything and hopefully it will even out.
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Yeah I would give it some time. Pool math has been dead on for me. Maybe triple check the pool size? But would imagine the pool builder is right on size lol!
 
Dabrodas said:
Yeah I would give it some time. Pool math has been dead on for me. Maybe triple check the pool size? But would imagine the pool builder is right on size lol!
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Not necessarily we have seen them either say larger or smaller... I would always try and figure it out myself vs going with what they say.. I used an avg depth to guesstimate mine then as I added chemicals I could adjust further
 
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