Hi

What are some good fish that I can add (or one fish) that will eat the
snails but leave
the plants alone??

IMHO you can invite to your tank:
Botia sidthimunki:
http://www.loaches.com/species_pages...thimunki.shtml
or
Botia dario: http://www.loaches.com/species_pages/botia_dario.shtml

--
Regards / Pozdrawiam
Bartek Lipczynski
www.infofarm.com.pl/~bartek