Wow, for a pool that tests at zero chlorine, its looking pretty clear!
To use PoolMath you need to first put your pool size in gallons at the top, then scroll down to the bottom yellow area "Goal Levels" and input that your primary source of chlorine is...what?? Do you have a SWG or use liquid chlorine (aka bleach) or what?? Then you want to select that you want to use Troublefreepool.com levels, and what your pool surface is (plaster, vinyl or fiberglass). All these parameters have affect on the suggested levels of each chemistry test, as you'll see as a range in each test level. Input your own test results in the left hand "Now" column, and using the suggested levels pick a goal level to type in to the "Target" box. Fill it all out and hit "Calculate" and you'll see suggested fixes (if you need them).
Obviously the first thing for you is going to be getting chlorine in to that water! Your CYA is 60 (round up or down, no middle ground) and your chlorine should never drop below 5 with a goal of 7 (to allow for daily drop so you won't go under 5). Your TA is ridiculously high, so I question that? Your pH is fine, but if you can lower it to 7.0-7.2 repeatedly with muriatic acid, it will drag the TA down with it over time. Then you just use a fountain or method of aeration to raise the pH again. Next your calcium is really high too, but being in FL you can lower that over time with the repeated rains you get that require small drains to keep pool from overflowing. Stop using calcium products in your pool (if you are) to avoid developing calcium scale.
