Several weeks ago I added a full 5lb bag of clorox pH down that I got from amazon last year. Didn't change the PH at all. A couple weeks ago I added another full bag that I'd just bought. That maybe dropped it .2. 4 days ago I added a full 5lb bag of pH down that I bought from the local pool store. That stuff made the pool insanely cloudy, but didn't change the pH AT ALL. Anyone know whats going on? pool is 40K plaster. levels are PH=7.8 TA=110 CH=200 TC=4 FC=3.5 CYA=56
pH down not working
- Thread starter neato5oh
- Start date
- Feb 6, 2015
- 6,337
- Pool Size
- 12300
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
What test kit are you using?
How did you get a CYA of 56?
Use muriatic acid to lower pH.
How did you get a CYA of 56?
Use muriatic acid to lower pH.
Use hydrochloric acid 31.45% and not pH Down.
Also, you need to track TA more than pH when trying to lower the pH.
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Also, you need to track TA more than pH when trying to lower the pH.
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Pool Care Basics
Overnight Chlorine Loss Test
SLAM Process
PoolMath
FC/CYA Levels
Test Kits Compared
Become a TFP Supporter
Thanks for the replies. I'm using a Hach 17N test kit for the pH. I have muriatic that I can use but I like to use the dry stuff because in the past I've dumped it on the steps and really cleans up the stains (this didn't happen with the stuff I used this year). Maybe there's just a bunch of bad-batch dry acid in circulation? Was wondering if anyone else had good or bad stuff lately, and if good what brand and where did you buy it.
- Jun 1, 2018
- 14,010
- Pool Size
- 26000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
Dry acid adds sulfates which is also not something you want.
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Sulfates - what's the problem?
Generally, the use of "dry acid" is not recommended on this site because it adds sulfates to your water. What's bad about sulfates :?: Since TDS is well-established as a non-issue, I can think of two possible things: 1. "montezuma's revenge" - politely called "gastric distress", is usually...
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Safe Storage Conditions:
Store and handle in accordance with all current regulations and standards. Keep container tightly closed and properly labeled.
Material is hygroscopic and will readily absorb moisture.
DO NOT store dry product where exposed to moist conditions.
Keep separated from incompatible substances (see below or Section 10 of the Safety Data Sheet).
Incompatibilities/ Materials to Avoid:
Alkalis, Oxidizing agents, Acids
Store and handle in accordance with all current regulations and standards. Keep container tightly closed and properly labeled.
Material is hygroscopic and will readily absorb moisture.
DO NOT store dry product where exposed to moist conditions.
Keep separated from incompatible substances (see below or Section 10 of the Safety Data Sheet).
Incompatibilities/ Materials to Avoid:
Alkalis, Oxidizing agents, Acids