DIRK SHADD | Times
About 30 swimmers with St. Petersburg Aquatics' USA Swim Club practice Tuesday morning at the North Shore Aquatic Complex. The 50-meter main pool at 901 North Shore Drive NE will close from Monday through the end of August for filtration upgrades. The 25-meter warmup pool will remain open. The new Defender filter will virtually eliminate the large amount of backwash water associated with sand filters. The upgrade is part of efforts to make the pool more eco-friendly, said Mike Jeffries, the city's parks and recreation director. "It is a greener, more sustainable filter," he said, and it's "a lot more energy efficient." The filter will cost $130,000, and installation will total $87,000.