Talk about feeling like a rookie. I just finished a system flush and will be cleaning and waxing it on friday. I did read all the info on using bromine in my spa and will be following the 3 step method and even went out and purchased a taylor k-2106(fas-DPD Bromine) to do it right. The products i have on hand are Marquis spas ph & alkalinity up and also a down one, Solus Chlorine-free oxidizer, suncoast stop yellow(99% sodium bromide) and a bucket of bromine tablets. There is a couple of sparkle stabilized chlorinator granules containers but i dont think i will be using them in this, at least i dont think so. Its a 580gal maxxus spa and a fresh fill. The instructions on the mod squad posting says that i am supposed to adjust TA and PH and add calcium or metal sequesterant if needed. Is TA total alkalinity? If so does ph & TA go up and down at the same time since the product i have does either up or down on both. The other issue i have is this, Mod squad said to establish the bromine reserve bank by adding sodium bromide first then the tablets to maintain, but the container i have (Suncoast stop yellow} says that 1 cap full (4oz) per 10,000 gal. So how am i to determine how much product for a 580 gal spa? Whats with the spa dealer telling me to use a box of baking powder on the first fill? I really want to get this right the first time and i am reading the booklet that came with the test kit, the products instructions on the containers and the posting by mod squad and trying to make it all fit together so i can make heads and tail of it all without growing a second arm in my spa. Thanks ahead for any input guys.