High TA

[CapMorgan]

For the first time i was trying to rasie my PH using baking soda. My PH got down to 7.0 so I raised it to 7.6 using the baking soda now my TA went up to 230 what can i use to just lower my TA without lowering my PH.

Thanks,
CapMorgan

[cappykat]

How much baking soda did you use?

[Dr. Spa™ Ret.]

Sodium bicarbonate (sodium bicarb, bicarb or baking soda) has a pH of 8.3 and contributes bicarbonate to total alkalinity. Because the spa water pH is close to the pH of the bicarb, it will have a greater effect on TA than pH.

[CapMorgan]

cappycat i used 9 tablespoons of baking soda.


Tub has 360 gallons of water.


CapMorgan

[Brewman]

 Ph decreaser is used to lower Ph and alkalinity.
Ph increaser is used to raise Ph, with minimal affect on alkalinity.

Alkalinity increaser is used to raise alkalinity.  Alkalinity increaser is Soduim Bicarbonate (baking soda).

Not sure if they make a product just to lower alkalinity.
I've not seen one.

What I have to do to my very high alkalinity tap water is to use a lot of Ph decreaser to lower the alkalinity, and it does lower Ph along with.  Once I get alkalinity to where I want it, I use Ph increase to bump Ph back up.

[dsegel]

Ph decreaser is used to lower Ph and alkalinity.
Ph increaser is used to raise Ph, with minimal affect on alkalinity.

Alkalinity increaser is used to raise alkalinity.  Alkalinity increaser is Soduim Bicarbonate (baking soda).

So you would only use baking soda if you want to raise TA without any effect on pH?  What's the "dosage"?

[Dr. Spa™ Ret.]

So you would only use baking soda if you want to raise TA without any effect on pH?  What's the "dosage"?

1 TBS will add aprox. 20 ppm of TA per 100 gallons of water.

[Brewman]

So you would only use baking soda if you want to raise TA without any effect on pH?  What's the "dosage"?

Baking soda may have an effect on Ph, minimal perhaps.
Doc gave you the right dosage.  I just add an ounce or two over time to get an idea of the amount.

[cappykat]

I thougt 9 tablespoons sounded like quite a bit.  I generally use 2-2.5 ounces.

Thanks Dr. Spa for the dosage.