With my reactor the water is sprayed into the cannister and drips down the media and is held inside until the air pressure builds up enough (3 to 5 psi) to push down a float valve and release the water/air back to the tank.
By injecting the Ozone under pressure and keeping some of the water in the chamber, contact time is increased.
Think of it this way.
In a skimmer, the OZONE is constantly pumped into a "body" of WATER and leaves the chamber as fast as the water is pumped through it.
In these reactors, the WATER is sprayed into a pressurized "body" of OZONE , then dripped down media and held for release until pressure is built up.
Perhaps this comparison will help to make more sense as to why reactors work more efficently than any skimmer could.
Notice how there is no body of water in the reactor. Just pressurized Ozone with water dripping down the media.
