You want all of the free ozone out of the water by the time it leaves the reactor. The whole point of the reactor is to maximize gas to water contact, and therefore lots of plastic strips for surface area. You also don't want a ton of flow through the reactor. You want dwell time. If you are getting ozone into your vessel through the venturi and a high pressure Luft pump at the correct flow rate, then you should be there. What is your ORP variation over several days with no ozone added? That might give some insight.
Lou
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