Every year when I open the pool after being closed for the season my PH is always off the charts, and scaling is an issue. I am thinking about lowing my PH to 6.0 just before closing to see if that helps with the rising of the PH over the winter.
Lowering the PH before closing for the season
- Thread starter c ment pond
- Start date
- Jul 21, 2013
- 54,406
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Lowering your pH to 6.0 can cause etching and damage your plaster.
A high pH is less damaging to plaster then a low pH.
What is your TA?
A high pH is less damaging to plaster then a low pH.
What is your TA?
TA is 80, CH 300 I thought it was the hi PH that was causing the problems? I will have to re think that.
- Jul 21, 2013
- 54,406
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
It is natural for a closed pool pH to rise above 8. It ususally causes no problems or damage. You just knock it down upon opening.
Okay, for some reason, when I open the pool in the spring the pool surface (plaster) is a bit rough and I hate draining the pool and polishing it again, I thought is was because of the PH. so something else is causing it to be rough. Any thoughts on that?
- Jul 21, 2013
- 54,406
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
It's probably a bit of scale that you an get rid of naturally by running your CSI at between -0.3 and -0.6 for a few weeks after opening. Usually that is easy to do since the water is cold.
Do you use PoolMath and watch your Calcium Saturation Index (CSI) - Trouble Free Pool ?
Yes , always right on and use the TF 100 test kit and additional Taylor test kits as well
- Jul 21, 2013
- 54,406
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Scaling and etching are different things and opposite ends of the CSI range. A negative CSI (typically associated with low pH) will etch (remove) plaster. A positive CSI (associated with high pH) will scale (deposit) calcium on plaster.
- Jul 21, 2013
- 54,406
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
I use - pool calculator - on line I don't save the readings, I have a note book that I keep of my tests. my last CSI was -0.02