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6 Lbs Baking Soda And No Change In Ph?


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#1 Andrew61987

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Posted 29 August 2008 - 06:11 AM

20,000 in ground vinyl liner pool. Alk is about 110 - 120. I have been keeping the chlorine level fairly high, probably between about 5 - 10 ppm over the last 3 or 4 weeks or so to combat some algae. The pH is 6.8. I added a couple pounds of baking soda which was all I had and after 24 hours observed no change. Added a few pounds more and now it has been several days and the pH has not budged.

Any suggestions?

#2 mumpelnc

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Posted 29 August 2008 - 06:48 AM

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QUOTE(Andrew61987 @ Aug 29 2008, 06:11 AM) <{POST_SNAPBACK}>
20,000 in ground vinyl liner pool. Alk is about 110 - 120. I have been keeping the chlorine level fairly high, probably between about 5 - 10 ppm over the last 3 or 4 weeks or so to combat some algae. The pH is 6.8. I added a couple pounds of baking soda which was all I had and after 24 hours observed no change. Added a few pounds more and now it has been several days and the pH has not budged.

Any suggestions?


Baking Soda raises Alk, Borax raises Ph..

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#3 Andrew61987

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Posted 29 August 2008 - 06:12 PM

QUOTE(mumpelnc @ Aug 29 2008, 07:48 AM) <{POST_SNAPBACK}>
Site
QUOTE(Andrew61987 @ Aug 29 2008, 06:11 AM) <{POST_SNAPBACK}>
20,000 in ground vinyl liner pool. Alk is about 110 - 120. I have been keeping the chlorine level fairly high, probably between about 5 - 10 ppm over the last 3 or 4 weeks or so to combat some algae. The pH is 6.8. I added a couple pounds of baking soda which was all I had and after 24 hours observed no change. Added a few pounds more and now it has been several days and the pH has not budged.

Any suggestions?


Baking Soda raises Alk, Borax raises Ph..



rolleyes.gif Baking soda will raise pH just fine.

Something else must be up.

#4 chem geek

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Posted 29 August 2008 - 08:36 PM

Adding baking soda does not raise the pH very much. 6 pounds added to 20,000 gallons starting with a pH of 6.8, TA of 110, assumed CYA of 50, raises the pH only to 6.87, but the TA rises to 131. Baking Soda is NOT for raising pH, but for raising TA. If you added 20 pounds of baking soda to your pool, it would have raised the pH to 7.0 but the TA would rise to 181.

To raise the pH, you use either 20 Mule Team Borax or you use pH Up which is the same as Arm & Hammer Super Washing Soda (sodium carbonate). Use The Pool Calculator to calculate amounts of the chemical you choose to use.

Richard

#5 mumpelnc

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Posted 31 August 2008 - 06:24 AM

QUOTE(chem geek @ Aug 29 2008, 08:36 PM) <{POST_SNAPBACK}>
Adding baking soda does not raise the pH very much. 6 pounds added to 20,000 gallons starting with a pH of 6.8, TA of 110, assumed CYA of 50, raises the pH only to 6.87, but the TA rises to 131. Baking Soda is NOT for raising pH, but for raising TA. If you added 20 pounds of baking soda to your pool, it would have raised the pH to 7.0 but the TA would rise to 181.

To raise the pH, you use either 20 Mule Team Borax or you use pH Up which is the same as Arm & Hammer Super Washing Soda (sodium carbonate). Use The Pool Calculator to calculate amounts of the chemical you choose to use.

Richard



Thanks Richard...

I thought I Had to go back to Pool School biggrin.gif

24' Intex Metal Frame
Purex Triton Sand Filter SD60
Original pump 2500 GPH

#6 Andrew61987

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Posted 31 August 2008 - 12:01 PM

QUOTE(mumpelnc @ Aug 31 2008, 07:24 AM) <{POST_SNAPBACK}>
QUOTE(chem geek @ Aug 29 2008, 08:36 PM) <{POST_SNAPBACK}>
Adding baking soda does not raise the pH very much. 6 pounds added to 20,000 gallons starting with a pH of 6.8, TA of 110, assumed CYA of 50, raises the pH only to 6.87, but the TA rises to 131. Baking Soda is NOT for raising pH, but for raising TA. If you added 20 pounds of baking soda to your pool, it would have raised the pH to 7.0 but the TA would rise to 181.

To raise the pH, you use either 20 Mule Team Borax or you use pH Up which is the same as Arm & Hammer Super Washing Soda (sodium carbonate). Use The Pool Calculator to calculate amounts of the chemical you choose to use.

Richard



Thanks Richard...

I thought I Had to go back to Pool School biggrin.gif


I stand corrected, sorry mumpelnc.






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