ATLANTIC CITY - Judging by the 50 percent or more increase in attendance at this year’s Atlantic City Pool & Spa show, the industry is warming up after a few slow years in the down economy.

On Tuesday, the trade show got weather to match, and attendees lined up 100 deep to get into the Atlantic City Convention Center.

“Wow, the show’s much bigger than last year,” Sean Redfern said to his partner as he stepped onto the exhibit floor.

Redfern said there were more people and more exhibits, which made him happy since he’s a wholesale distributor from West Chester, Pa., looking for new products to offer.

Trish McCormick, show manager for the Northeast Spa & Pool Association, said more than 9,000 people had preregisted for the show. Two years ago, the association was happy to have 6,000 people in attendance.