So this is the first time I'm trying to use the 3-step method in my 390 gallon hot tub. I have the TF-100 test kit.
Added brand new water, pH/TA was 7.5/220 which is normal; so I added Sodium Hydrogen Sulfate ~14oz and now my pH/TA is 6.8/110.
I am still going to get my pH back to 7.5ish, but I started with the first step which is add Sodium Bromide.
I added 2oz (bottle says "add 1/2 ounce of Sodium Bromide for every 100 gallons of spa water to establish a 30 parts per million bromide reserve")
Now according to my understanding reading the above method, I should use the Orthotolidine test and it should be blindingly yellow as the highest values is 10ppm and I added enough to get it to 30ppm.
The test is completely clear, no bromine at all. What am I misunderstanding? Do I need to add a cup of bleach before testing?
Thanks for reading!
Added brand new water, pH/TA was 7.5/220 which is normal; so I added Sodium Hydrogen Sulfate ~14oz and now my pH/TA is 6.8/110.
I am still going to get my pH back to 7.5ish, but I started with the first step which is add Sodium Bromide.
I added 2oz (bottle says "add 1/2 ounce of Sodium Bromide for every 100 gallons of spa water to establish a 30 parts per million bromide reserve")
Now according to my understanding reading the above method, I should use the Orthotolidine test and it should be blindingly yellow as the highest values is 10ppm and I added enough to get it to 30ppm.
The test is completely clear, no bromine at all. What am I misunderstanding? Do I need to add a cup of bleach before testing?
Thanks for reading!