We’ve always been advocates for alternative filtering systems for backyard pools and there are even options for creating natural ponds. But the barriers to going “no chemical” are many and they include, higher-cost of filtration system, finding a company to maintain your pool, overall effectiveness.
Here are the leading chemical free swimming pool filtration systems that typically rely on a mix of ozone and copper and silver ions to filter your pool. Decide for yourself.
Wailini izone System
Keeping Chlorine Out of the Pool [via NY Times]