Can water chemistry affect pool plaster ?
- Thread starter JcSparky
- Start date
Makes sense, thank you. So my pool water is 78F and fill water is 75F, not that much difference. Where do you recommend the sump pump be (deep or shallow) and the fill water be (deep or shallow) ? It will be raining here over the next couple of days, so I imagine the pool temp will drop a few degrees.The weight of the water helps hold the pool in the ground. Drained pools have popped out of the ground due to pressure of the ground water.
We have a water exchange process that can exchange pool water for fresh water without draining.
Read...
Draining - Further Reading
www.troublefreepool.com
- Jul 21, 2013
- 53,860
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
- May 3, 2014
- 58,919
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
As your pool water chemistry is pretty benign (low CH, no direct salt addition) I would base it on the water temperatures. So add water to the deep end and pull off the surface (shallowest step is good).
Your efficiency will not be great so go at least 10% over volume during the exchange.
Your efficiency will not be great so go at least 10% over volume during the exchange.
I think I noticed subtle changes last year some time during the summer.When did the pool start to look like this?
Maddie
Ok. I guess it's a mystery how your pH can be 7.8 after 3 years of nothing but tabs.
Thank you. I will attempt a pool water exchange over this week following the previously stated guidelines.
The new pictures look like there are copper stains on the plaster, but it might be the color of the plaster.
Can't raise the pH if the TA is below zero, which is what would happen if only trichlor was used.
The pH and TA readings are not possible if only tabs were used.
We're missing some relevant information.
We're missing some relevant information.
- May 3, 2014
- 58,919
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Could those 4n1 tablets have baking soda or sodium carbonate in them? 6% other ingredients that I cannot find what it is.
My fill water has a pH = 7.5 if that makes a difference.
I'll post updated numbers soon.
OrangeAndBlue
Silver Supporter
- Aug 19, 2017
- 128
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
How long ago did you get the TF-100 and how old are those reagents?
I just learned the hard way that reagents do go bad and will give poor results if not replaced regularly.
I just learned the hard way that reagents do go bad and will give poor results if not replaced regularly.
Possibly tetraborate, but it would not be enough to offset the acidity.
Based on a CYA of 260, the TA would have dropped by about 300 ppm.
Even if the tabs were 50% tetraborate, the TA would still be down by 140 ppm.
Based on a CYA of 260, the TA would have dropped by about 300 ppm.
Even if the tabs were 50% tetraborate, the TA would still be down by 140 ppm.
red-beard
Gold Supporter
- May 27, 2019
- 1,621
- Pool Size
- 25000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite Pro (T-15)
Back on the possible "bad plaster job", look at the original photo and look at the plaster and the glass tile. That was not done at an expert level. I would say they is a possibility that this is a combination issue.
I was wondering when someone was going to ask that question. They are a year old and will replenish soon. I was thinking this could be causing my numbers to be wacky.
The tabs would have to be about 40% soda ash to offset the acidity of the tabs.