I have a 6 inch jardini, with.
12 inch Indo tigers, 8 inch ITs, 9 inch frontosa, and 10 inch FRT.
The jardini Has shown no aggression, but I still think I am taking a risk. From all the research on this forum, after 8 inch my jar could turn and start attacking. I am willing to take this risk, as I have a spare tank for him in case. I have no desire to add any other arros to the tank. Just stick to 1 jar.
Right now though, I'm mine worried the tigers having a pop...