Check the caudata.org species entry
www.caudata.org/cc/species/Notophthalmus/N_viridescens.shtml
quick answers
you could fit alot in a 75g. with such a large tank you may want to try and build some island/shelf land features.
food:blackworms,bloodworms, chopped/tiny earthworms
mixing: not advised Species Mixing Disasters


