Borates to TA comparison

smackdab

Well-known member
Mar 17, 2015
157
Georgia
Can you compare the same buffering ability of borates to TA? Really the question I'm asking is: How many ppm of borates = the same buffering power of 10 ppm of TA?
 

JoyfulNoise

TFP Expert
Platinum Supporter
May 23, 2015
15,864
Tucson, AZ
Can you compare the same buffering ability of borates to TA? Really the question I'm asking is: How many ppm of borates = the same buffering power of 10 ppm of TA?
TA encompasses both carbonate alkalinity as well as borate alkalinity (and cyanurate alkalinity). They are all species that buffer the pool water against changes in hydrogen ion concentration. They also have different pKa values and so their buffering strength is different at different pH values. Carbonate and cyanurate alkalinity tends to buffer against increases in hydrogen ion concentration (lowering of pH) while borates buffer against decreasing hydrogen ion concentration (rising pH).

Chem geek has posted about the buffering capacity of pool water in these two posts -

pH Buffer Capacity

TA--What is it really?

You can't think of it as borates being a "replacement" for carbonates, they are complementary to one another.