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Author Topic: PH / ALK - Chem Problems  (Read 2151 times)

skylark

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PH / ALK - Chem Problems
« on: March 23, 2007, 01:31:10 pm »

Hi

Water balancing is proving to be a frustrating challange. I am a novice and have a dimension one chairman II

My tap water has a PH of 7.7 and alk of 60.
What can I use to raise alk but not PH when filling tub?

Water has now been in tub around 21/2 months , is hazy, and alk is 190! I have been putting in Baqua Spa PH up (sodium carbonate)  occasionally as needed but hadn't been checking ALK. This stuff must be also increasing the alk?

How do I independantly raise or lower PH or Alk without effecting the other?

Thanks so much for your advice.

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PH / ALK - Chem Problems
« on: March 23, 2007, 01:31:10 pm »

Brewman

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Re: PH / ALK - Chem Problems
« Reply #1 on: March 23, 2007, 01:42:04 pm »
Next time try adding sodium bicarbonate to your tap water.  It should bump your alkalinity up.  It could slightly raise your Ph, too, but only a bit.  

Sodium bicabonate is packaged as ALK Increaser, but you can use plain old baking soda if you want.  Same exact thing.
Brewman

Spa_hottie

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Re: PH / ALK - Chem Problems
« Reply #2 on: March 23, 2007, 01:42:58 pm »
BaqauSpa makes a Total Alk. Increaser but no decreaser, so you would need to lower your Alk. with PH decreaser.  Depending on how many gallons you have you would add 4 oz. of ph Decreaser for 300 to bring it down 40 ppm.  You will have to ignore the ph level for about 24-48 hours because it will fluctuate but that should fix the Alk. problem then you can adjust your Ph if needed. ;)
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skylark

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Re: PH / ALK - Chem Problems
« Reply #3 on: March 23, 2007, 01:48:44 pm »
Thank you both so much for your advice. I'll give it a try!

tony

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Re: PH / ALK - Chem Problems
« Reply #4 on: March 24, 2007, 02:01:29 pm »
Quote
BaqauSpa makes a Total Alk. Increaser but no decreaser, so you would need to lower your Alk. with PH decreaser.  Depending on how many gallons you have you would add 4 oz. of ph Decreaser for 300 to bring it down 40 ppm.  You will have to ignore the ph level for about 24-48 hours because it will fluctuate but that should fix the Alk. problem then you can adjust your Ph if needed. ;)

Baqua Spa Total Alkalinity Increaser is sodium hydorgen carbonate, the same as sodium bicarb or baking soda.  It will raise pH along with TA.


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Re: PH / ALK - Chem Problems
« Reply #4 on: March 24, 2007, 02:01:29 pm »

 

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