Once again, if it's already that big at 4 months, it isn't a bristle nose. If it has grown 2" in 2 months, that's a lot which leads me even more to believe it's a common pleco.
yeah, ive had my bristlenose for about.... 2 months, its a tiny bit more than an inch and i bought it really small, bout 3/4", these things dont grow too fast.....