Bromine pH question

HarryP777

Member
Jan 1, 2020
6
Sonoma, CA
My question is the pH in my spa is always high requiring 1-2 oz of Sodium Bisulfate to adjust the pH down to 7.2-7.4 every time I test weekly or twice a week depending on bather load, (which does not seem to matter in regards to pH). Is this normal my thoughts are that the spa is always running a high pH so the water is in a high alkaline state, could this be corrosive to the spa. Alkalinity and hardness are in balance, bromine levels are 3-4ppm typically, I currently use HASA Brominating Tablets (1-Bromo-3-chloro-5, 5-dimethythydantoin) 96% tablets,
I was under the understanding that bromine will drive the pH down not up.

Thanks for any help
 

YippeeSkippy

Mod Squad
LifeTime Supporter
Jan 17, 2012
14,963
Evans, Georgia
Spa pH tends to rise easily due to the aeration of the jets being used.

I find Muriatic Acid easier to obtain my desired results. I never used bromine so can't comment there, sorry!

Maddie
 

Mdragger88

Bronze Supporter
Jun 1, 2018
1,473
Hernando, Ms
I 2nd the use of muriatic acid- as the dry acid has sulphates which are not good for your heater.
What is your actual ta?
That has a major effect on ph in your spa.
There’s info in this sticky on adjusting ta
Most find it helpful to get ta to around 50
 

HarryP777

Member
Jan 1, 2020
6
Sonoma, CA
Generally I keep the TA at 100, although now that I read the above it is to high Taylors book recommends 80-100 for hypoclorite etc and 100-120 for bromide so the TA is defiantly high.