If you have an Ollies, check them in May. You can get 12% for $2.99 a gallon. A lot of people say don't stock up but I buy around 40 gals in one run and keep it in my air conditioned dark basement. I buy it like that because it's a one time shipment n once it's gone, it's GONE!
I actually have a couple Ollies around me. Ill have to check that out, do you know what brand it is they sell that is 12%?
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Also, I got my TF-100 test kit in the mail so I'm good to go for testing.