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.
Medical Definition of melamine. 1  1: a white crystalline organic base C3H6N6 with a high melting point that is used especially in making resins by reaction with aldehydes. 2  2: a resin made from melamine or a plastic made from such a resin.