i feel its alot more efficient by far !! keeps water super clear !! also the skimmers pulls out alot more with ozone than with out imo
!! i also added a fish once(coral beauty) with out qt
like a dummy and had ick develop on her with in a few weeks it was gone and no other fish caught it !! there was no way to catch unless i pulled out all the rock !!
i agree if ya dose with out an orp ya can be in alot of trouble if ya using to much !! i dont use one but with around 200 gallon volume i only dose 50 mg
/h and have not had any issues with any fish !! i feel that using lesser amounts is safer than going the full amount they say ya can add to a tank with or with out an orp controller !! just my experience with it mabe ill get bit in the rear but so far i love it and will stay with it !! just my thoughts though !