My female is now about 9" in my 360g. The smallest fish in there are a shoal of redtailed barbs which have maxed out at 4-5". I do a head count once in a while and they're all still there. She doesn't show any interest in them at all, so her early predatory stage may have been just a phase.Bobo got really big (~11") but still showed no interest in smaller fish to eat.
But then again those redtailed barbs are lightning quick and they have 360 gallons to swim in, so a slow old thing like a choc ain't gonna get close, lol. And there aren't any plants for her to use as camouflage/ambush, not that chocs are a type of predatory ambush fish anyway.
But still, in my 180 she sure took a liking to my Odessas. I think they call fish like that "opportunists". You certainly can't rule predation out completely with chocs ime.