Philips have been selling this for fish tanks. Very small bubbles of air and ozone react with the poluted water. Edit: here an in depth article about this subj

Philips have been selling this for fish tanks. Very small bubbles of air and ozone react with the poluted water. Edit: here an in depth article about this subject: http://kb.marinedepot.com/article.aspx?id=10541 http://kb.marinedepot.com/article.aspx?id=10541