I'm not quite sure what you mean by pressurized. It's sealed, there's no way for air or water to get out unless it's travelling out the outlet hose.

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.

http://i66.photobucket.com/albums/h2..._1489Large.jpg

http://i66.photobucket.com/albums/h2...9/IMG_1480.jpg

Did it come with the gauge?

Yes it did. You adjust the airflow to keep it between 3 and 5 PSI

Where did you say you got it and how much?

I got it here. Great guys.

PRO240D Ozone Reactor
CAF-12 Carbon Air Filter
SR7 Carbon Water Filter

Total 540.00 USD before shipping.

http://www.marinetechnical.com/page6.html

http://www.marinetechnical.com/page17.html

Wow, very nice reactor but too expensive for this guy. I wonder how hard it would be to make something similar?

The reactor showed up today. I think it looks pretty good especially for the price. $88.00 + $20.00 shipping.
No duty or UPS charges for once.

It came with instructions, media, ballvalves, a 5 PSI check valve, all the fittings, clamps and tubing. Some of the fittings are even pre-wrapped with teflon tape.

And a lifetime warranty against leaks.

Here's the pics.

http://i4.photobucket.com/albums/y12...k/IMG_2101.jpg
http://i4.photobucket.com/albums/y12...k/IMG_2102.jpg

http://i4.photobucket.com/albums/y12...IMG_2104_1.jpg

They only take money orders from Canada but they were great to deal with.

My contact was

Harriet at
Aquarium Life Support Systems
3343 Mynatt Ave
Knoxville, Tn 37919
865-588-0108
fax 865-588-1976
www.aqualifesupport.com
harriet@aqualifesupport.com

Follow up
After running this reactor since Oct.13 it's raised my ORP from 275 to 350 and there is a big difference in my 220. I used to have to clean the glass every few days, now it's once a week or so. There was a little cyno in the fuge that is gone as well. The water does really seems to sparkle now under the light in the sump. People have said it makes a big difference and I have to agree.
I imagine it's partly because I had a low ORP to start with.
I had to adjust the skimmers a little bit wetter and the skimmate is more of a green-black color than the green-brown it was.
I'm running a Red Sea 200mg controller at 150mg with a 500g air dryer and a carbon reactor on the output.

And thanks for the help from andrewsk.

Does you 200 mg/hr red sea unit set at 75% run 100% of the time?