Sorry to join in the discussion so late. I also am very Pro 03 use. Over the several years that I've used 03 generators I've had wonderful results in my reef and in many others as well. The differance in reefs which do and do not use 03 is significant IMO. Personally I wouldn't consider running my reef W/O one. It doesn't seem to make a differance to fish though. Although in all cases I think that the higher redox level achieved through the use of these devices is a good thing..David
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