New plaster, low CH

[Roger Bull]

I got plastered two weeks ago and my CH is staying around 150. Should I be concerned? I know that in Arizona it will rise over time but I'm wondering if being low now will cause any issues with the fresh plaster.

My PoolMath logs are in my profile.

 

[Texas Splash]

For the first month we like to see a CSI closer to neutral or even slightly positive. You can confirm with your builder, but I would recommend letting the pH rise a bit more. Let it ride up to 7.8 and that should help quite a bit. I'd hate to see you add calcium when it's going to skyrocket later this year.

 

[mknauss]

Stop using the pucks. They are acidic and keeping your pH too low. Do as Pat said, let the pH rise.

 

[Roger Bull]

I was told to keep the pH around 7.0-7.2 and I'm also following the Pebble Tec guidelines at https://mmgtx.com/docs/PTI-Start-Up-Maintenance-Procedures-Chlorine.pdf

I have had to add acid to keep it in the suggested range. Was using leftover pucks to increase CYA. Most of the chlorine is coming from liquid.

 

[mknauss]

That is all great. Just realize the low CSI is pulling calcium from your pool finish.

 

[Roger Bull]

That is all great. Just realize the low CSI is pulling calcium from your pool finish.

That was my concern. I think I'll add calcium and then deal with high CH down the road.
The post by pooldv here has me nervous about causing long term damage.