Ozone
Hey i used ozone for years with a euro skimmer and had no problems.But it depends on what type of ozonizer you'er useing dose it have a controller,air dryer,carbon,and reactor?
Ozone is often used by reef aquarists to "purify" their tank's water. To most aquarists this means making the water visually clearer, so they elect to start using ozone to improve clarity. Not everyone notices such improvements, however, and some aquarists have been disappointed.
When ozone is first added to reef aquaria, ORP (oxidation reduction potential) rises. What exactly this means on a molecular level is complicated and not well understood, but it is the expected result of oxidizing the various redox active chemical species in the water. Some aquarists see a big rise in ORP - large enough that they need to control the ozone generator so that the ORP does not rise too high (>450-500 mV). Others see a relatively small rise, and still have ORP in the 300 mV range even after using the generally recommended amount of ozone. Some even find that it remains in the upper 200 mV range. This variability is important for aquarists to keep in mind, and they should not conclude that there is a problem if the ORP remains fairly "low."
In the absence of ozone, my aquarium seems to have an ORP that ranges in the mid- to upper 200 mV range. While I monitored ORP carefully when initiating ozone to be sure not to overdo the addition, such concern was unfounded. Even when adding ozone at full production (100 mg/h as claimed by Aqua Medic; equivalent to about 0.5 mg/h/gallon of display volume or 0.3 mg/h/gallon in the entire system), the ORP never rose above about 335 mV. Even with newly dried desiccant in the air dryer, a freshly cleaned skimmer and ozone added to any of the devices that I used (Coralife ozone reactor, straight into a skimmer, or my tubing reactor), the ORP was never higher than this. Even when used through the skimmer with no activated carbon treatment of the effluent, the ORP was no higher. Consequently, I did not need to use the ozone on a controller.
Was ozone being added? Clearly, yes. The water's ORP exiting my tubing reactor measured 680 mV. I could also detect an ozone/OPO residual of 0.1 - 0.24 ppm chlorine equivalents. So the ozone was having the desired effect on the water in the reactor.
Would the ORP have risen more with additional ozone? Certainly, yes. But using higher amounts of ozone causes more risk of harm from overdose, and it may not further improve the primary reason for using it: water clarity. More ozone might have resulted in more disinfection of the water in the ozone reaction chamber, and possibly a further reduction in dissolved organic levels, but I am not sure that either of those is necessarily beneficial.But whatever you do start with a low mv,to be safe.
