Hi - first post. I've just got a new hot tub. 384US Gallons acrylic - has a filter with a bromine tab dispenser built in. I did the first fill, and followed the instructions. Warmed it up, started adding conditioner, bromine tablets, oxidizer (potassium monopersulphate) and after adding that, it turned quite green the next day. I've read Bromine in My Spa thread a few times. I'm guessing that this is from copper reacting. I'm surprised - this is not well water, it's city water, I would be surprised that it has that much. But - if I can figure out how to upload a pic, I can show how green it is - it's very clear water, but has a very bright green color to it. This fades after a while, but adding more of the oxidizer will make it green again.
After reading the articles here for my pool I bought a Taylor K-2006 kit that I've been using to test. I realized I probably didn't have enough tablets dissolved to get this going properly. With the filter running 24x7 right now, it's already dissolved 3 tablets and I've got 6 more in there and they are maybe half way dissolved. I added more of the oxidizer they gave me and that will get my FC (or Bromine or whatever that tests shows) up, but it quickly will come down below 2 the next day - even with no soak. Adding the R-0870-I barely turns it pink and one drop of R-0871 will make it go clear right away. Seems like I can't get the FC up and I think maybe it's because I don't have bank. The pH is 7.4 and the TA is 90-100 - I can't seem to get it higher.
I'm thinking of draining this and starting over - (or maybe I can save this???) using this guide and getting sodium bromide as suggested. However, I'm worried I drain and I'll be back where I am with green water. I was going to take a water sample (both from the hose and tub) to a pool place to test. I'm just curious as to what you think I can do. They gave me a conditioner, which I added before balancing - it contains Sodium hexametaphosphate, 1-Hydroxyethylidene diphosphonic acid and tetrasodium salt. Maybe I need more of that? Or something different? I'm not sure if this is what I need to get rid of this green color, or when to add it, or if I can save this without doing a drain. Any ideas?