In Fenners' book he guarantees that there is no risk of harmful ozone from an ozonizer designed for the hobby. The only downside he mentions is increased corrosion of rubber or silicone-tubing materials. The benifts listed:
- aids in "burning up" organica snd disease-causing microbes
- raises pH
- boosts dissolved oxygen and redox
- maximizes efficiency of your protien skimmer
- raises ORP
- quick chemical degradation of large organic molecules that are responsible for off-color, turbidity, low oxygen and some tixicities
He recommneds an ozonizer before investing in meters, dosers, denitrators or UV sterilizers. I think I'll add one to my equipment list
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Learning about this hobby is a hobby in itself!