Filled the spa yesterday and tested the water before adding sanitizer. My TA was 280! I think pH was about 7.3; CH about 300. Can I use dry acid to lower alk in the same way one uses muriatic in a pool, or does that not work?
This morning my pH was on the high side, say 7.7. But the water was quite warm, and I read later this morning that temperature affects the pH test. Should I let a sample cool to room temp and then test the pH?
OOOOhhh! It just occurred to me that since I shocked last night, the bromine level was probably still pretty high. I know high chlorine levels interfere with the pH test--does high bromine do the same thing??
Since I'm using bromine which is rather acidic, that is purported to "eat" alkalinity. . . perhaps I should just monitor the alk and see if the bromine brings it down??
This morning my pH was on the high side, say 7.7. But the water was quite warm, and I read later this morning that temperature affects the pH test. Should I let a sample cool to room temp and then test the pH?
OOOOhhh! It just occurred to me that since I shocked last night, the bromine level was probably still pretty high. I know high chlorine levels interfere with the pH test--does high bromine do the same thing??
Since I'm using bromine which is rather acidic, that is purported to "eat" alkalinity. . . perhaps I should just monitor the alk and see if the bromine brings it down??