I've had three ozonizers in the past... two Enaly and one Resun. Ozone has always been good in my tanks. The previous ozonizers looked and felt cheap, and were cheap. This one is 3X the price, and looks much better built. Time will tell, but for now, first impressions make me think this is a quality unit. Wasted my money on the previous three ozonizers (but at least I learned something from them). Decided to finally get one that has top-notch reputation, and so far, it is living up to its reputation, (Posted on 3/23/12)

Well packaged product. Surpised at the number of adapters and hoses included to fit nearly any applications. Solidly constructed metal case with variable output for much more adaptability than a non adjustable model. Labratory quality feel. Combined purchase with the Coralife Luft pump has an unexpected ability to have precise dial control for skimmer output adjustment. Highly recommended combo. (Posted on 11/21/11)

After going through 2 Red Sea units, I decided to by this. I have had it running for about 5 months now and it's working great. I have a BRS drier in front of it. This works excellent in improving water clarity and maintains ORP. (Posted on 9/29/11)

I got one of those stupid redsea ozonizers because it came with an ORP controller and seemed cheaper. Well it worked fine for a few months but just got weaker over the months and by the end of the year was next to worthless. I didn't get my ozotech here but it has lasted me over five years and works today like it did the day i turned it on. My recommendation is using this in combination with a reefkeeper controller. The stand alone controllers are cheaper to begin with but in the long run the reefkeeper controller does so much more and a way better long term investment. (Posted on 8/29/10)

I use this on my 700gallon tank (400 gallon display). Within 48 hours I had increased water clarity, improved skimmate production and raised my ORP levels to 400mv. I had a couple of tangs (achilles and power blue) that were showing initial signs of ich. Since adding the ozone the ich has subsided although I am not 100% sure this can be attributed to the ozone. Great product.

Make sure you get an ORP controller too! (Posted on 4/22/10)