This issue confuses me. I have heard good/bad and tried to read online. Which for me makes it more confusing. Exactly what is it suppose to do and are you suppose to feed the ozone into your skimmer? I have read some people's bad mishaps and it is more trouble than it is worth. But too many 3 letter abbreviations makes me feel like I'm reading my niece's face book wall. I would love something that would increase skim mate gunk but not at the expense of what I am using it to improve.