Phoenix — Leslie’s, Inc., the largest direct-to-consumer brand in the U.S. pool and spa care industry, is turning 60. The company also has opened its 1,000th store. Leslie’s was founded in 1963 by Phil Leslie Jr. as a single location in Los Angeles. The retailer has grown to a 1,000-store chain across 37 states, providing pool owners and professionals with everything they need to keep pools and spas clean, safe and beautiful. The company opened its 1,000th store in early April in North Port, Fla. Leslie’s is well known for …