I have an ozone test kit and have never measured any residual ozone in the tank. The skimmer produces very dark liquid via wet foam. It might help if a marine biologists could actually list what is considered plankton in the scientific community. I have this information but would need to do more research to find it. Here is some basic info.
Every marine tank has picoplankton in the form of bacteria.
The plankton in my tank that I am referring to are nanoplankton, microplankton and mesoplankton. I dont have megaplankton and may not have macroplankton. I could provide a list of familys of species that are in there. I hope nobody though I meant megaplankton. I have a real large plankton population in my tank to.