Chemical balance with heater

librajenn626

Member
Aug 19, 2018
21
Deer Park/NY
My husband is installing a heater for our pool tomorrow. I’ve heard that certain things like hardness need to be right in order to not damage the heater. It’s a stainless steel heat exchanger so my husband feels that because it’s stainless it won’t get affected by the water but I’m not so sure about that. Any input would be greatly appreciated.
 

librajenn626

Member
Aug 19, 2018
21
Deer Park/NY
Ok thanks. What about CH? I read somewhere that ~200 is the lowest it should be and mine is 125. Should I increase it or is that unnecessary and just a waste of money?
 

librajenn626

Member
Aug 19, 2018
21
Deer Park/NY
Hi. I have been debating whether or not to increase my CH and am looking for some serious input before I bother wasting money on unneeded chemicals. In past years when I would bring my water to be tested (yes, before I found this site I used to get my water tested at Leslie’s 😬) my CH was always low and most of the store reps would tell me that if I don’t have a heater then I don’t need to worry about CH because I have a vinyl pool. Well now this year we finally installed a heater. It’s a stainless steel heat exchanger that is piped right to our house’s hot water heater. My current CH is 125. I did read somewhere on this site that ~200 is a safe minimum level so should I increase my CH? Will my current level affect the heater at all? My husband thinks that because it’s stainless steel it won’t be affected by any chemical levels. Is that true?

P.S. - since finding this amazing site I do already know that pH is something I need to pay close attention to as that can definitely damage the heater.
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
36,976
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Your heater is not a direct fired gas heater? If it is not, then the CH requirement is not applicable.
 
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mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
36,976
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Direct gas fired heaters only. The CH requirement comes from the old standards concerning steam boilers.
 
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ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
24,583
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Thanks. I have read that before and that’s where I heard about the CH minimum of ~200. I don’t know if that applies to all heaters or only certain kinds. Mine is a stainless steel heat exchanger so I don’t know if that makes any difference 🤷🏻‍♀️

I edited it to clarify that it only applies to gas heaters as Marty pointed out.
 
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librajenn626

Member
Aug 19, 2018
21
Deer Park/NY
While I have you guys here...pool math is telling me that my pH and TA are outside the ideal range. It’s such a slight amount...should I bother adjusting them?
 
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