I was in petsmart the other day looking for some new fish (after having no luck at the nicest lfs) and after waiting 20 minutes for someone to help me i told them i wanted a green terror and a bala shark they told me no...and i said why not? and they said because the green terror was labled as "aggresive" and the bala shark as "semi aggressive"....they were small fish going into i large tank..i didnt see any problems...maybe you guys do? i was so mad...i should have said "did the same people who told you that also tell you that pacus max out at 24 inches??????" (thats what the tag said on the pacus)