here's some care sheets you should take a look at:

http://www.wnyherp.org/care-sheets/amphibians/fire-belly-newt.php

http://exoticpets.about.com/cs/salamanders/a/firebelliednewt_2.htm

http://www.repticzone.com/caresheets/349.html

http://www.repticzone.com/caresheets/349.html

http://www.repticzone.com/caresheets/410.html

http://www.repticzone.com/caresheets/434.html

http://www.pollywog.co.uk/cynopsorientalis-caresheet.html

here's just a few, to win a case you need evidence, now give me more links that say newts need no land. it's not like i looked hard for these, just googled them. you try, it's called researching BEFORE you buy a pet.