Water changes

[ReefOcean]

Originally Posted by Aquattro

I don't understand your question...

The best I can guess is you'd call it a closed system. Which requires keeper intervention. Fish don't feed themselves in the tank, you add food. The tank doesn't heat itself, you add heat. The tank doesn't clean itself, that's your job...

Keepign a system that can't sustain itself (at least substatially)and requires constant water changes due to bioload would be considered irresponsible, at least by me. I guess the different being is what you are going for, a pretty display tank with way to much livestock to show off to guests, or a more realistic enclosed bio-system ( to a degree)