Adding a new newt

[Gemma613]

I am on my way to getting a new newt (c. orientalis) to add to my tank with one other and an amano shrimp.
I was wondering if the newt I already have will be territorial and aggresive towards the new fella? Should I get a smaller newt so my newt doesn't feel threatened?
Any help much appreciated, thanks

 

[froggy]

You won't have any problems with aggression. Try to get a newt as similar in size as possible to avoid accidental injury during feeding.

The most important thing is to QUARANTINE the new animal, for as much as several months if it is from a pet shop. This is to avoid diseases spreading from the new newt to the one you already have, and also to allow the new animal to settle in as quickly and as well as possible.

There is an article on this at caudata culture here: Caudata Culture Articles - Quarantine and Disinfection