Know what you mean about Florida water. We are near Disney and the water is undrinkable.. Well it is drinkable if you can get past the smell and the taste.. We purchased a system at a Escapee's rally from these folks
www.rvwaterfilterstore.com
We use a F5/cfb-10 plus 5 micron filter and a F1 cbfc-10 1 micron filter in series along with the proper canisters and fittings. They must be good filters and they are not cheap. The entire set up cost , I think 200.00 or so.. It cleans up that foul Florida Water to where it is completely drinkable.. We have one of those water testers and the Water tested nearly as pure as spring water but the smell and taste was horrible. You can call these folks and tell them exactly what you want to fix and they will build a system for you....