Sebastian Aho had his first 2-goal, 3-point night of the season, Pyotr Kochetkov stopped 25 shots -- 14 in the 3rd period -- and Jaccob Slavin looked like his old self as the Canes beat the Predators, 4-1 in Nashville.  Carolina sweeps the 2-game season series having won the first one earlier this month in Raleigh.  Aho's 10th goal, on the power play, early in the 3rd period doubled the lead to 2-0.  Then he set up Seth Jarvis for his 19th of the year to make it 3-0, before icing the game with an empty net goal with 45 seconds left in the 3rd.  Jackson Blake was stellar again.  He had the game's first goal, in the 1st period, banging home a rebound of Logan Stankoven's shot.  And, Blake also had the primary assist on Aho's power play goal.  The Canes have won 5 straight and lead the Metro by 5 points.