wow thats funny
i also have three geen tigers and three original
from what i have learned and read and was told lol and observed...
tiger barbs do better in larger groups of their same kind
there are some other fish that they might not get along with too well in a tank, however every fish has a different personality
the more barbs the better, to an extent, you dont want to over crowd the tank with them
i love tiger barbs, and they should have plenty of room to swim around, your tank will def. be large enough lol.
as for the other fish...
well the cory's and loaches should all be fine with the barbs, and vise-versa
not sure about eels lol never had any dont know anyone who does
how big are the tigers now?
what tank do you have them in? what do you feed them, and are they agressvie towards themselves?