Cloudy water

PoolNewb2020

Well-known member
May 7, 2020
302
Lathrop, CA
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

Gold Supporter
Silver Supporter
Jul 5, 2018
113
Acworth ga
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

Gold Supporter
TFP Guide
Jun 5, 2017
1,003
Oil City PA
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

Bronze Supporter
Sep 19, 2019
45
Phoenix Arizona
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

Member
Jul 4, 2020
21
Stafford Springs CT USA
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?

Thanks
 

Jim1590

Member
Jul 4, 2020
21
Stafford Springs CT USA
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
 

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