Fresh Fill - Increased TA & CH - Now pH too high

[rmcderm313]

Hi All,

I just filled my hot tub (700 Gal)with fresh water.  I'm planning on using the dichlor/bleach method.  I tested the TA, pH and CH as follows (with the Taylor K2006 kit):

TA = 60 ppm

pH = 7.6

CH = 70 ppm

I added 3.1 oz calcium chloride and then 3 oz. of sodium bicarbonate to raise the TA and CH respectively.  After a few hours I tested again:

TA = 80 ppm (right where I want it I think)

pH = 8.0 (too high)

Acid demand = 1 drop

CH = 120 ppm (sufficient, I think)

I've tried to lower my pH back down by adding 1/2 oz of Sodium Bisulfate.  After an hour pH is still testing at 8.0.  I just added another 1/2 oz. and will test again after running pumps for 15 minutes (recommended on the package).

Did I try to hard to get the CH and TA in check?  Should I have left them where they were? 

I haven't added any dichlor yet.  Should I wait until my pH is good before adding sanitizer? or do I need to get some sanitizer in the tub ASAP?  No one is using the tub until my chemicals are good.

Any advice on getting back to a good TA-pH,CH is appreciated.

Thanks,

Rob

 

 

[rmcderm313]

The second addition of Sodium Bisulfate also did not reduce pH. In fact I think the color is a bit 'redder' in this test.

Help!

Rob

[rmcderm313]

I added 1.7oz of Dichlor and my pH fell back to between 7.4 and 7.6. For right now I'm good.  When I test for Chlorine demand in 24 hours, I'll check for pH again to see how things are.

Rob