Ozone, ORP, and more

[plunderisley]

I'm thinking about getting a ozonator for my 75gal reef and was looking into going with Sander. What unit would be good for a 75gal? 25mg/hr? 50? 100?
I would most likely be hooking this up to the PS. I'm also thinking about using a air dryer for it.
With monitoring ORP, the units do cost some $ and I was already looking into doing some automated control. Any units out there that one can recommend that can monitor the ORP, PH, salinity, and more?

 

[sirreal63]

I run a Sanders 25 mg and run it less than half output. I have used this unit since 2005 and have had no issues with it. Ozone is very powerful and it really doesn't take a lot to help the water clarity. The biggest mistake people make with ozone is running too much. I have about 130 gallons of water volume and the little 25mg performs flawlessly. I use a dedicated ORP controller set at 350. If your goal is just water clarity and improved skimmer performance, then the IME the 25 is all you need. I have mine being fed into the venturi of my skimmer, no drier and I run a little ROX8 carbon in a bag at the effluent of my skimmer. With the small dose I never smell ozone and feel it is safe. The effect is crystal clear water and improved skimming.

If you are trying to nuke things with the ozone, it gets more complicated and expensive. I don't suggest using ozone in this way, though people do, it just requires more equipment and is more dangerous.