As you found out you can plug it into a wall. It doesn't say that I can see how much ozone it puts out. I don't think it's much because I don't even see the ozone generator inside so it must be very small. I would use it but I am nuts. Just be sure you don't smell any ozone in your tank how ever you are setting it up. I would run the outflow over a long trough or use some other way to eliminate residual ozone being we don't know how much it produces, it will be experimental. It probably says it on the back or in the literature. Be careful with that thing as ozone will even rot pictures of Mother N Laws