UPPER EAST SIDE, NY — The Olympic-sized pool at Upper East Side fitness center Asphalt Green has reopened after a three-week project to install a new water filtration system, the center announced this week.

The 50-meter pool has serviced more than nine million New Yorkers since it opened in 1993, but was using its original water filters, a spokesman for Asphalt Green told Patch. Upper East Side City Councilman Ben Kallos secured more than $600,000 for new Neptune Benson Defender filters for the pool.

The new system will keep the pool cleaner and require less maintenance by filtering a whopping 2.6 million gallons of water per day, an Asphalt Green spokesman said.