Anyone know of what I could keep with a Blue crayfish?

[Lobster-chan]

Hello.
I've had a 20gal tank for a couple of years now. I only have two lemon tetras at the moment, and a 6 inch Blue cray. I've been told that Blue crayfish can't generally be kept with fish, although I've never seen mine try to eat my tetras ( he will eat all my java fern, though ). I'd really like to give him some more tank companions, preferably ones he won't eat and ones that won't eat HIM.
What are your suggestions?

Thanks!

 

[OrionGirl]

It's honestly going to be hit or miss. Some crays leave fish alone, some go after everyone they see...and sometimes they change their mind after years of leaving things alone. Adding more tetras might be the first test I would suggest--tetras prefer a group, and having 4 or so more would make the pair happier.