How important is it to track calcium hardness in an above ground pool? Our pool store is telling me that I rusted out our pool wall because of calcium hardness.
Calcium Hardness in AGP
- Thread starter Tfaff
- Start date
- Jun 22, 2014
- 52,028
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
For vinyl, low calcium is not an issue. High calcium (i.e. 400 or more) could be an issue for scale. More than likely any rust was attrubutable to other factors like a low pH and not CH.
Recommended Levels - Trouble Free Pool
Recommended Levels - Trouble Free Pool
Can you share current test results?
What does your FC & CH usually run?
I believe rust on the wall would be more likely due to poor workmanship, or damage that allowed oxidation of the metal to occur
- Oct 25, 2015
- 5,815
- Pool Size
- 28000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60 Plus
Not possible. CH high would not cause rust. Could cause calcium deposits if too high. What are your test results?
Chris
I'll check the CH tomorrow. Here's the story: We are selling the house. I hired the pool company to pull up half of the liner to cut out what I thoughy was a 1" root sticking up. It's been there since they put the pool up 3 years ago. Turned to be rock amongst about 20 2" rocks that were sitting right under the liner. Not much sand was mixed in with the rocks. I think they put the pool up in the rain, we were out of town at the time and there had been many setbacks.
When they pulled the liner up we saw that you he pool wall was very rusted, after three years. Pool company contacted manufacturer and after much ado agreed to warranty it but said I had over chlorinated it. They wanted to see my records.
Today I get an email from the pool company telling me my numbers were all off and I wasn't paying attention to calcium hardness and I caused the corrosion. I just want to pass the pool on and help the new owners so I'm trying to learn what mistakes I may have made.
When they pulled the liner up we saw that you he pool wall was very rusted, after three years. Pool company contacted manufacturer and after much ado agreed to warranty it but said I had over chlorinated it. They wanted to see my records.
Today I get an email from the pool company telling me my numbers were all off and I wasn't paying attention to calcium hardness and I caused the corrosion. I just want to pass the pool on and help the new owners so I'm trying to learn what mistakes I may have made.
I can say this are the current readings minus the CH:
Chlorine 6
CYA 50
PH 7.5
Alkalinity is 120
This is pretty typical for my pool
Chlorine 6
CYA 50
PH 7.5
Alkalinity is 120
This is pretty typical for my pool
- Jun 22, 2014
- 52,028
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
That is industry mumbo-jumbo, and I say that from my own personal experience. That's the token-line answer. Most of the industry still does not formally recognize elevated CYA levels as a requirement for increased FC levels. In addition, because "general" industry standards toss-in a relative CH number across the board, they expect ALL pool owners to comply, regardless of the pool type or materials used to fabricate it .... or else. To a degree, I understand the company's need to protect themselves, otherwise they'd go broke replacing everyone's pools - many of whom do not manage chemicals correctly. But those of us with TF-100s and Taylor K-2006 kits who DO manage chemicals properly, we have to suffer. It's a shame.
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