I’ve read that alkalinity and pH should not change that much and only need to be tested weekly. That’s not true of mine -it can be fine & I can go in alone for a half an hour and the next morning when I test, it’s WAY low. I use a drop test kit. Is there something wrong this indicates? Can this be a sign it needs a change of water? It’s been 2 months.
Wide swing in readings
- Thread starter Sjde
- Start date
- Jun 22, 2014
- 52,206
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
When you say it's way too low, are you referring to the TA, pH, or both? How do you typically adjust the pH and/or TA when needed?
What are your pH and TA levels?
What size pool?
Salt Water Generator?
What type of sanitizers?
You should add your pool information to your top signature so we can better help you.
What size pool?
Salt Water Generator?
What type of sanitizers?
You should add your pool information to your top signature so we can better help you.
TA 20, pH I am not sure of the number but the test sample was yellow. 375 gallon hot tub using chlorine-the Frog in-line chorine system with a chlorine cartridge.
- Jun 22, 2014
- 52,206
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Because of that very acidic water, I would go ahead and do a water exchange. Just easier that way. You should also consider doing a system purge with Ahh-Some while you're at it. Let the Ahh-Some do its thing then change the water. The pH and TA should never be that low as it really cause some damage, so just be careful about the acid dosage amounts.
- May 3, 2014
- 63,059
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Oh, the chlorine. What I use (granules in a cartridge) is supposedly released as needed.
- May 3, 2014
- 63,059
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Not chlorine. The trichlor. And it just dissolves. The system has no idea what is ‘needed’.
Non chlorine shock is monopersulfate.
Non chlorine shock is monopersulfate.
- May 3, 2014
- 63,059
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
If it is a solid with chlorine, it has either cyanuric acid or calcium. And I do not think it is calcium.
I believe it is the same stuff they use for toilet bowl cleaning pucks.
No idea on the MPS. Likely acidic.
I believe it is the same stuff they use for toilet bowl cleaning pucks.
No idea on the MPS. Likely acidic.
- May 3, 2014
- 63,059
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
It will have CYA in it. Likely dichlor if I remember right.
Regardless. It is very acidic.
- May 3, 2014
- 63,059
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
A stabilized, granular, fast-dissolving form of chlorine. Because it dissolves so easily, it is often sold as “shock”. Like trichlor, dichlor adds chlorine and CYA to your water and lowers the pH. Use of dichlor can raise your CYA level very quickly.
- Jun 1, 2018
- 16,231
- Pool Size
- 26000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
The frog system causes a myriad of effects that are hard to anticipate & account for. The same goes for mps.
It is not uncommon for ph to rise frequently in a spa due to the aeration.
It should be tested daily along with fc
FC/CYA Levels
The mps & frog are acidic so your ph rises with the aeration & they bring both ph & ta down.
I suggest you ditch the frog& mps & follow this guide upon refill after an Ahhsome purge
www.google.com
It is not uncommon for ph to rise frequently in a spa due to the aeration.
It should be tested daily along with fc
FC/CYA Levels
The mps & frog are acidic so your ph rises with the aeration & they bring both ph & ta down.
I suggest you ditch the frog& mps & follow this guide upon refill after an Ahhsome purge
How do I use Chlorine in my Spa or Hot Tub?
If you have a question about any information within this Sticky, please start a new thread for yourself where you will receive very quick responses to your specific questions. Thank you! Introduction There are two main things to consider when maintaining your hot tub water, Water Balance and...
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