Florida outshot Ottawa 19-8 in the first.
"Against teams like this, they're putting everything to the net," Forsberg said. "They're creating a lot. You don't have any time to think about anything. You kind of just go with the flow. Obviously it's easier than just standing there for 20 minutes and not getting any shots at all."
Duclair got Florida within 3-1 on a power play at 8:55, scoring on a one-timer set up by Giroux, who has four assists in two games since arriving in a trade with the Philadelphia Flyers.
Hornqvist made it 3-2 at 9:57. He followed his rebound by chipping a shot from below the goal line off Forsberg and the right post before it bounced back toward the net. Forsberg reached back with his glove, attempting to freeze the puck against the post. After review, it was determined the puck was in his glove completely across the goal line.
"We keep grinding," Panthers forward Jonathan Huberdeau said. "That's the kind of team we have. I think we have a lot of comebacks this year. We know we have enough talent to score some goals."