I have 2 red tailed and 3 unknown species at the moment. And they are with hujeta characins and doing good. As soon as they get to around 6-7'' the will be placed in the big tank with a Tatuaia payara and sengal bichir.---------If I could find more reds My goal would be to have as many barra's as i could find in one tank. Basically anything that will not eat them and is to big to be eaten is a good tank mate. They will not attack any fish that is above food size.
Yea the size was not but adult barra's are allmost unheard of in the trade for sale. A 10''er would fetch a price of close to 100-150 bucks and i would not think that the OP spent change like that, but you never know. They usually come in at around 3-5''