ozonated water

Hi, I need someone to help me with some questions I have. I bought ozonator ENALY OZX-300U and started to use it very intesively until someone told me that ozone could be toxic and could damage my body rather than do good. I read a lot in the Internet about ozone, oxygen therapy etc., but still have questions.
What kind of water is better to ozonate?
What happens to tap water if ozonated? Is it purified?
Shall I drink the water right after I switch off the machine or shall I wait a while?
How long does ozone last in the water?
What happens to the ozonated water when it is left over? Can you drink it later throughout the day, is there still oxygen in it?
How much ozonated water can I drink without harming my health?
Can I give ozonated water to my kids?

If there is someone who could answer my questions, I would deeply appreciate it.
Any information on ozone is appreciated too.
Thank you!