Yes, dissolved oxygen supersaturation can occur when surf is really up - there were many days when I lived in Hawaii where the ocean appeared to be filled with milk, due to microbubbles. In high light algal growths could drive O2 way up in some of the anchailine ponds (saturation at that salinity and temperature was around 7 ppm, but supersaturation was seen at ~16 ppm). I've got a Hach HQ40d data logger with a luminescence dissolved oxygen probe. It's just sitting there. I'll put it on a tank and record readings when I get back in town Sunday. Oxygen content of course depends upon many factors (temp, pressure, salinity) but boils down to oxygen demand and oxygen transfer rates.
From this discussion on BOD and oxygen saturation in our reef tanks, I see big advantages to using peroxide to energize oxidation chemistry in our reefs tanks. I have used peroxide for many years to sanitize algae & inverts in 10% bath for 10 minutes.
I get mixed results with sanitizing snails from cyno or Red Planaria tanks.
@Paul B
After 2 weeks operation, I am harvesting Green Grapes from “zooplankton generator”.