+ POOL was conceived in 2010 by four friends: Archie Lee Coates IV and Jeff Franklin of the design firm PlayLab; and Dong-Ping Wong and Oana Stanescu of the architecture firm Family. It started as a simple idea: instead of trying to clean the entire river, what if you started by just cleaning a small piece of it? And what if you could change how New Yorkers see their rivers, just by giving them a chance to swim in it? With this thought in mind, four designers proposed + POOL --- a floating plus-shaped pool in the inner harbor of the NYC waterfront, designed to filter the very river that it floats in through its walls, cleaning more than 600,000 gallons of water every single day. No chemicals, no additives, just natural river water.