I've used Nanofil for other species, mainly with lures, jigs in particular, sometimes with floats. Its a good line, long casting and very sensitive. However, it doesn't stand up to rocks very well, requires special knots, and is bad to get wrapped around the tip of the rod, which cost me a rod once when I was hopelessly snagged and trying to break the jig off, and didn't notice that the very limp nanofil had wrapped around the tip....
Furthermore, while many braids, as well as fused lines like fireline, sometimes break above their stated breaking strength, nanofil will break at exactly what it states....or less when you factor in knots.
Despite its flaws, its a good line, but maybe not the best line for carp fishing.