Ph / Ta relationship

TexasTomKat

Gold Supporter
Feb 9, 2021
75
Frisco, TX
Pool Size
18000
Surface
Plaster
Chlorine
Liquid Chlorine
Ph-7.4
Ta-70
Chl-4
Cya- 50-55
Calcium-240
Test with Taylor kit and reagents .
Trying to bring up Ta without pushing Ph ? Any tricks ? 80-90 TA usually results in 7.6 -7.8 ph on the high side.
Seems they are attached and move in tandem.. driving me nuts . Using liquid acid and liquid chlorine to balance,And Ta increaser powder to raise Ta. Pool builder thinks 70 Ta is fine, he also started my pool with pucks and no calcium hardness checks. Spa spills over and runs off main pump can’t turn off spill over .. water features run occasionally.
Thanks
 
Last edited:

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
44,321
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Trying to bring up Ta without pushing Ph ?
Why? No reason to raise TA.
You might look at adding some calcium.

How are you testing the pool water chemistry?
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
29,060
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Ph-7.4
Ta-70
Chl-4
Cya- 50-55
Calcium-240
Test with Taylor kit and reagents .
Trying to bring up Ta without pushing Ph ? Any tricks ?

Trick is TA down to 50 is ok. TA of 70 is fine.

80-90 TA usually results in 7.6 -7.8 ph on the high side.
Seems they are attached and move in tandem.. driving me nuts . Using liquid acid and liquid chlorine to balance,And Ta increaser powder to raise Ta. Pool builder thinks 70 Ta is fine,

On that your PB is correct.

Spa spills over and runs off main pump can’t turn off spill over ..

Have a valve added to turn off spillover and setup your Aqualink with dipsswitch 3 to enable SPILLOVER mode.

 

TexasTomKat

Gold Supporter
Feb 9, 2021
75
Frisco, TX
Pool Size
18000
Surface
Plaster
Chlorine
Liquid Chlorine
Why? No reason to raise TA.
You might look at adding some calcium.

How are you testing the pool water chemistry?
Wet edge recommendations- 80 min Ta
Ph 7.6 max .. at 80 Ta ph sits at 7.6-7.8 and slowly goes over during the week.
I like to set up low for the week when I travel . Testing with T-2006
 

TexasTomKat

Gold Supporter
Feb 9, 2021
75
Frisco, TX
Pool Size
18000
Surface
Plaster
Chlorine
Liquid Chlorine
Trick is TA down to 50 is ok. TA of 70 is fine.



On that your PB is correct.



Have a valve added to turn off spillover and setup your Aqualink with dipsswitch 3 to enable SPILLOVER mode.

Going by wet edge recommendations 80 Ta min and Ph 7.6 max looking at pebble tec they give a little room on Ta of 70 but ph 7.6 max .. who knows similar products , I have wet edge.
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
29,060
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Going by wet edge recommendations 80 Ta min and Ph 7.6 max looking at pebble tec they give a little room on Ta of 70 but ph 7.6 max .. who knows similar products , I have wet edge.
Those differences are arbitrary.

Good luck.
 

Donldson

TFP Expert
LifeTime Supporter
Jun 12, 2009
5,150
NW Ohio
Wet edge recommendations- 80 min Ta
TA has no direct effect on a pool surface. Most likely the recommendation is because of the possibility that the owners would be using trichlor tablets to chlorinate, which are highly acidic and need higher TA to avoid the water going acidic. When using neutral/basic sources of chlorine (liquid or SWG) the TA needs to be lower to maintain a relatively steady pH.

Unless there is a specifically stated warranty requirement to keep TA at that level you're not doing yourself any favors by following it. Follow their pH recommendations and allow the TA to drop to whatever level best accommodates that.
 

TexasTomKat

Gold Supporter
Feb 9, 2021
75
Frisco, TX
Pool Size
18000
Surface
Plaster
Chlorine
Liquid Chlorine
You will drive yourself crazy trying to follow those.
Too late, yeah this pace for me is not sustainable.. I’m going to keep ph stable and let the The Ta settle where it’s at.. I’ll add some calcium since that’s been pretty stable..still learning with this pool . Thanks
 

Enjoying this content?

Support TFP with a donation.

Give Support

TexasTomKat

Gold Supporter
Feb 9, 2021
75
Frisco, TX
Pool Size
18000
Surface
Plaster
Chlorine
Liquid Chlorine
TA has no direct effect on a pool surface. Most likely the recommendation is because of the possibility that the owners would be using trichlor tablets to chlorinate, which are highly acidic and need higher TA to avoid the water going acidic. When using neutral/basic sources of chlorine (liquid or SWG) the TA needs to be lower to maintain a relatively steady pH.

Unless there is a specifically stated warranty requirement to keep TA at that level you're not doing yourself any favors by following it. Follow their pH recommendations and allow the TA to drop to whatever level best accommodates that.
That’s sound advice, I was heading that direction.. I was thinking those parameters are liability based. Thanks for the input.
 

reggiehammond

Gold Supporter
Oct 4, 2020
373
Fort Worth, Texas
Pool Size
30000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
CircuPool RJ-60 Plus
Test your fill water; you may be picking up CH from topping off in this heat...
 
Thread Status
Hello , This is an inactive thread. Any new postings here are unlikely to be seen or responded to by other members. You will get much more visibility by Starting A New Thread