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Thank you so much! - When I get home tonight I will post the exact names of my start-up chemicals - to the best of my memory the bottle only says "Oxidizer- Non-Chlorine Shock" - but I will confirm.

I'm a new tub owner - one week today - we have an ozonator, and I'd say over the past week I've put about 6 tsps of chlorine granuals in our tub and I've not been able to get any FC reading on my test strips. Last night I tested after we got out - the total chlorine was higher than the free...

Greetings from a new (one week today) tubber! We have a 5 person 470 gallon hot tub with an ozonator. I have been using the test strips and no matter what I do I can't get my Free Chlorine level to register. I tested last night after we got out - (2 bathers, but we are heavy users, maybe total...