Cloudy water

[PoolNewb2020]

I just checked my logs and my CYA was 50ppm last month, I checked it last week and it was 40ppm. The temps here hover around 100f and it is sunny all the time, I also have an auto filler. How much of the loss can be attributed to heat, UV or fresh water? I don't know, but I know it needs to be monitored regularly.

 

[Kellyp]

Just a touch north of Atlanta and I cannot make it through the summer without adding cya back to 70. I have dropped from 70 to 60 once so far this season.

From Nov, when we stop using the pool, to April when we start, (pool stays operational, just too cold) my cya drops to 30 or below from 70.

I don't try to explain it, I am no chemgeek, but it is what I have observed in 2 years.

 

[JimMarshall]

I just checked my logs and my CYA was 50ppm last month, I checked it last week and it was 40ppm. The temps here hover around 100f and it is sunny all the time, I also have an auto filler. How much of the loss can be attributed to heat, UV or fresh water? I don't know, but I know it needs to be monitored regularly.

Fresh water is not the culprit (from evaporation). You’ll lose some CYA to degradation from the heat/UV load, the rest you lose to rainwater dilution and splash out.

 

[cme4oil]

I just checked my CYA yesterday, about 5 weeks ago it was a solid 60 but when I checked it yesterday, it was a solid 50. I’m in the Phoenix area of AZ so it’s a big UV / Heat load.

 

[Jim1590]

OK, I got all the test kits in and am updating Pool Math daily.

The Chlorine test is much more precise than a color test!

How often should I be checking CYA?

 

[mknauss]

How often should I be checking CYA?

Once you have CYA at the level you want, test it monthly during swim season.

 

[Jim1590]

My tests from yesterday to today showed the Chlorine level drop pretty badly. I traced the culprit to the old bottle of bleach (pool shock) I left sitting out in the sun. It is a leftover from last season.

Before I dipped into that bottle, I was using some fresher temp controlled 10% stuff, but ran out.

I have a couple pounds of granular shock sitting here. Math shows 8 ounces would be the correct dose for my pool. Any downside to this until I can pick up some more bleach tomorrow evening?

HTH 8371270 1 lbs Super Granule Shock - Pack of 15 - Walmart.com

Arrives by tomorrow Buy HTH 8371270 1 lbs Super Granule Shock - Pack of 15 at Walmart.com

www.walmart.com

Thanks

 

[JimMarshall]

That is completely fine to use up. It will add CH which is irrelevant to your setup.

 

[Jim1590]

Results from Overnight Chlorine Loss Test

8:50pm FC 2.4, CC 0.2, CYA 50
added 28 oz of bleach
10:30pm FC 6.6, CC 0.0
7:15am FC 6.2, CC 0.0

How is it looking, did I do it correctly?

Thanks

 

[JimMarshall]

Results from Overnight Chlorine Loss Test

8:50pm FC 2.4, CC 0.2, CYA 50
added 28 oz of bleach
10:30pm FC 6.6, CC 0.0
7:15am FC 6.2, CC 0.0

How is it looking, did I do it correctly?

Thanks

Yes, and it passed. How is your water looking now?

 

[Jim1590]

Yes, and it passed. How is your water looking now?

Water looks clear except some debris suspended that I posted about in another thread about filtering.

Thanks