Will all tetras school?

[CJ29DJ]

Do all types of tetras school together? For example, would a group of cardinal tetras and a group of rummy-nose tetras school together? If so, would other schooling fish with the same genus school together?

 

[Rivercats]

Sometimes a few odd tetras will school with another species if they have no other option but mostly with the exemption of cardinals and neons, most will school with their own species. I keep a school of 25 cardinals and 25 rummynose and they never mix, each staying within their own school.