+ POOL, a proposed floating pool whose walls will filter millions of gallons of the East River daily, is all the rage with New Yorkers now as its Kickstarter gets over 40% funded in the past week.

An artist's rendering shows a cross-section of the Plus Pool floating off of Brooklyn on New York's East River. Courtesy / + POOL On Friday, at 10:30 a.m. EDT, a Kickstarter campaign will end for the ...