Are Fish Healthier In A Reef Type System Or In A Fish Only System?

[atoll]

That should read healthier of course.
So what do you think and what are your experiences with keeping fish in a reef system and a fish only system, in your experience were/are your fish more healthy than in the other and if so why?
Personally, my fish seem more comfortable in my reef than when I had a fish only system but that was many many moons ago and of course things have changed greatly. I am not talking the ability to medicate but just the general overhaul health of fish compared to each system. Discuss.

 

[eatbreakfast]

I find they are hardier in a reef. The fact that water quality has to be maintained to a more stringent degree for the corals, so fish benefit from that stability.

Also, there is a greater diversity of microorganisms in in a reef. And diversity is always good.

 

[atoll]

I guess its more a case of horses for courses.