My pool's recommended CH is 250 -> 350. I measured it at ~365 about last Oct/2021 timeframe and was surprised to be ~800 today 05/31/2022. (BTW, I just switched to use the new Pool Math calculator for WIN10). I know I should've monitored closely, but the drastic increase just boggled my mind. In addition, we are now on Stage #2 of conserving water, so I cannot just replace 50%-54% of my pool water to bring the CH reading down. I may be able to go by replacing water ~10% at a time with a 2 week cadence? My pool is pretty small but10% of 13,900 gallons is still a hefty 1,390 gallons and for sure the water district will not be happy. What do you folks think?
Calcium Hardness
- Thread starter isabelo
- Start date
- Jun 22, 2014
- 52,059
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
A CH of 800 is getting up there, and that was quite a jump in just 7 months, but it's still manageable. Stay close to the pH and TA to keep them on the lower end to compensate. That should buy you some time until water restrictions lighten up or perhaps you receive some summer monsoons.
- May 23, 2015
- 25,724
- Pool Size
- 16000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Install a whole house water softener (salt-based regeneration using an ion-exchange membrane) and plumb your pools autofill to that. Doing 10% drains with high hardness fill water is going to get you exactly nowhere. Measure the hardness and TA of your fill water and report back.
I'll make sure to manage pH and TA closely. Thanks Texas Splash.
