Originally Posted by Rivercats
The one I have now isn't even 2-1/2 inches yet and it's 2 years old. In the past the one's I've had never got over the 2-1/2 inch mark.
Yeah, this one is the biggest rio negro I've seen and owned, you're right they're very slow growers, the one in the pic is almost 2 1/2 and it feels like he'll stay that way for a long time.
Looking them up on the Internet says they get to 4 inches but that's insane, they must be ancient to get that size.