To be clear - this forum is meant to be support / assistance / discussion regarding one specific method of pool care. That method doesn't include ionizer or ozone systems. We're open about why - see links and discussions above, but we'll just recommend against those items as they aren't conducive to the pool care method this forum is here to discuss.
Will they work? Maybe. Maybe someone will have good luck with them, and not notice any negative effects. But it's not reliable, teachable, measurable, and trainable, so it's not something you'll get a recommendation on using from here.