Unfortunately, the pool and spa industry has used the same filtration media and cartridge design for over 20 years. YES, TWENTY YEARS... when so much has changed! Cartridge filtration is used to purify materials in pharmaceutical and other high-technology applications. Therefore, we knew Pleatco's scientists could find a better solution for pool and spa filtration. For nearly two years our research required visiting companies around the world. We tested hundreds of different materials and performed long-term experiments in Pleatco's state-of-the-art lab. Lastly, we conducted field tests in homeowners’ pools and spas throughout the United States. In the end, by partnering with Johns Manville, we have created the finest material used to filter pools and spas in the world. IT'S TIME FOR A CHANGE!