the only thin gi wish i woudl have done would have been to set the fuge up so that it gravity returns to the display. right now the fuge sits below the tank, and a little giant pumps the filtered water back up to the display. im sure some critters make it through the gaints impeller, but im sure that an equally high number dont, either way, you ensure the saftey of yoru critters, at lest until they get eaten by fish or corals. if the fuge is gravity fed back to the display, but this is not practical for the majority of us. anyhow, i think its a great natural filter, and you will be amazed at the amount of life that shows up in your fuge! its weird stuff!
good luck
jon