re: pygmy cories and your the salt in your tank.
Per wikipedia "...They can tolerate only a small amount of salt (some species tolerate none at all) and do not inhabit environments with tidal influences." http://en.wikipedia.org/wiki/Corydoras
Per wikipedia "...They can tolerate only a small amount of salt (some species tolerate none at all) and do not inhabit environments with tidal influences." http://en.wikipedia.org/wiki/Corydoras