Can you give us an idea of the TA reading? If it is below 100 adding the baking soda will be ok. I usually add about twice that much and my tub is 425 gallons. One note, after you add that wait a day to check again as PH takes awhile to stabilize.
If you can read PH on those strips, your better than I.
Thanks. The TA seems to be in the normal range but depending on how much regard you have for those strips it is probably more than 100, towards the higher end of the normal range. Can't remember exactly what though.
I don't have much confidence in the strips, hence my concern about the pH, but not sure what system might be better that one can afford and operate at home. Used to use the drops with my fish aquarium but that was still a color comparison and you had to be pretty sure of your drops. Have used tablets that you dissolve in water also but again you have to compare a color.
Not sure if there is a better way that is reasonably simple AND affordable. But open to suggestions!
Will add just one TBL spoon and wait a day to see what happens. But want to avoid being one of those guys that is constantly testing and tinkering with the chemicals.
Even though it is my nature to be exactly that... :-/