[abcha0s]

First thought - I think that running 700gph turnover on a 90 gallon tank is barely meeting minimums. It is definitly not "lots" of flow. Any way...

I've experimented with ozone. I've also done lots of research.

The first problem with using your skimmer is running the effluent through carbon. This is not always an easy task, but is completely necessary. What you need to avoid is restricting the water flow. Your ability to do this successfully will vary depending on the skimmer design.

Also, the ozone will degrade any bags that hold the carbon, so either change these regularily or be prepared for a carbon bomb in your tank.

As you pointed out, you also have to filter any air that escapes through carbon. While ozone in the water is bad for fish, ozone in the air is bad for you. Don't take this one lightly.

One option is a sacrificial skimmer. Something cheap, but good enough to introduce the ozone.

A better option is an ozone reactor. If you find a reasonable unit, please let me know. I am still looking for one.

Is it worth it? I think so, if you can solve the logistical problems.