I havent had datnoids for over 10 years and recently got 4x NTT and 1x IT. They are in a 200 gallon with some tank mates. They are all doing well and occasionally chase each other if one gets too close to their favorite hiding spot. One thing I noticed is they can really hold their ground. They are docile for the most part, but pack a punch when bullied. The smallest Datnoid (IT) seems to be on the top of the pecking order. 
