Interesting thread this and I am glad you bought the fish in the end and seem to be enjoying them
I have had 5 for 18 months now that live in a tank with 7 clown loach, stingrays, tiger fish, gar and arowana
I keep the tank well fed and the loach have no problems at 6" with the bigger fish and seem happy and active enough. They are more shy than the clowns and use the hiding tubes and the clowns and blues clans are seperate but when the blues are out usually at night near feeding time they look fantastic. I would love more