Although pool ionizer companies claim that their device allows for a chemical free pool, there is no such thing as a safe chemical free pool. ... Second, copper and other heavy metal pool ionizers are slow acting, and require several hours to pass before the heavy metals may have any effect on bacteria and other pathogens.

Are pool ionizers safe?

Pool ionizers and mineral purifiers work alongside your pool's sanitation system to reduce pool algae and bacteria. You cannot use a pool ionizer or mineral purifier alone to keep your pool clean. ... Pool water that only uses an ionizer or mineral purifier to clean the water has been proven unsafe for swimming.

Do pool ionizers really work?

Yes! Research has shown that those who use solar ionizers have to use significantly less chlorine and chemicals to keep their water clean. While it's not a substitute for chlorine, some ionizer users have reduced chlorine use by up to 50%. It has also shown to help reduce surface stains and buildup around your pool.