2 NGT's?

id say no, they are aggressive, and im not sure if theyd be aggressive towards each other, or gang up on a TBD, but i smell trouble

so u cant keep widebars wid ngts?

yes you can i tried and it worked out

Yes.

i have two n a 330, one is about 5" and the other is about 3 inch..they both hide all the time in the corners...never bothers anyone...

If your tank is big (100 gallons or bigger) and with lots of places for them to hide and call their territory, you can keep just 2. If the answer is no to any of the above, then just get
1. Sooner or later just 2 NGT's will try to kill each other, but if you have a group of 5 or more, the aggression is spread out to the point of being almost eliminated. It is like the african cichlid trick.

Ivan

so in total, you will have 4 datnoids in that tank. I would say give it a shot.

datnoids will always fight with each other, but by keeping them in a group, you help spread that aggression among the fishes in the group instead of having one fish taking up the beating singly.

When I had 3 large tigers (all 14"+) together....one tiger became dominant and beat up the other two.

Hopefully if you get more it will help spread the aggression. But it is possible to keep two together...I am currently doing it.