The tomatoes developed by UF are listed here in this document: http://edis.ifas.ufl.edu/pdffiles/AG/AG21300.pdf. They grow great here, they just don't taste great. Some tasty hybrids do well here - just not growing in unamended soil in the ground.
Chloramine, on the other hand, is a combination of chlorine and ammonia. While chlorine dissipates and evaporates into the air relatively quickly, chloramine is more stable and will last longer in the water system. The goal is to provide increased protection from bacterial contamination.
Chloramine must be removed from the water with a GAC (granular activated carbon) filter followed by a reverse osmosis or Cation filter. Note: The GAC filtration filters out only the chlorine from the chloramine molecule leaving the ammonia behind.