I have a gunite salt pool and my calcium hardness hovers around 400ppm. I know this is the upper end of acceptable. When it rains or if it doesn’t rain and I have to add a little water (200ppm CH out of the hose) the CH drops for a week or 2 and then back to 400. My pool is not cloudy and I have no scum line or buildup on the tile and equipment that I can tell. Should I act on it to lower the CH or just leave it alone as long as it doesn’t go any higher? I have cartridge filter system so from what I understand I cannot floc since I can’t discharge water without going to the filter. Is draining a few inches and refilling my only option? Would a hose filter help any?
Calcium hardness hovering around 400 ppm
- Thread starter HRR8998
- Start date
- Jun 7, 2017
- 9,153
- Pool Size
- 29000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Jandy Aquapure 1400
- Jul 21, 2013
- 53,111
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
CH up to 800 is manageable.
CH of 400 is fine. My CH has been around 450 for many years.
Use PoolMath, enable CSI tracking, and keep your CSI between 0.6 and -0.6, preferable between +0.3 and -0.3,
www.troublefreepool.com
CH of 400 is fine. My CH has been around 450 for many years.
Use PoolMath, enable CSI tracking, and keep your CSI between 0.6 and -0.6, preferable between +0.3 and -0.3,
Calcium Saturation Index (CSI)
How is CSI calculated? Very simple – use our PoolMath tool. To ensure long plaster life and save money, click here to learn more.
www.troublefreepool.com
- Dec 13, 2020
- 762
- Pool Size
- 19600
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Jandy Aquapure 1400
If you're curious, use the pool math app to check CSI. For mine even with high-ish natural pH and hot summers 430 seems to be the best balance. Often I see 200 recommended, which would be way off.