I confirm also, the best way is doing water changes and choose adult or sub-adult who are less demanding.
You can reach good results without ozon, take a look to my planted tank :
http://forum.simplydiscus.com/showth...no-Discus-Tank
No more CO2 just waterchanges and limited ferts.
I used ozon for a pond of 10m3 with some nishikigoi in it.
Even if everything was controled by ORP probes and regulator it ends in weaknessed fishes (auto immune defience) cause no more bacteria to fight due to sterilized water.
To avoid this kind of throwback you have to minimize the use of ozon and program some interruptions to force fishes developping immune system.
It is a bit violent cause you are modifying your parameters suddently which is not good for our pets.
It is also quite complex in terms of technic....shortly : you have to mix and disolve O2 and O3 via a protein skimmer placed in by-pass of your filter. break the remaining disolved O3 with UV lamps. air return need also to be filtered on active coal air filters.
The main risk is having a partial default of an element of your system which could results in non-disolved O3 in your tank. It will burn litteraly your fishes.
Ozon is also a source of cancers for humans. So if you are not experimented or coached by an expert get away.
I think you were talking about a Korean product but not an ozoniser.
I don't know the principle of this system.
But anyway, the highest is the redox potential the fewer water is acidic (increase of OH ions).
In conclusion not recommended for discus
Apologies if my wording is not perfect I'm not american.
kind regards,