Cody--refugia? That's a new one to me. But, you've educated me before.
Eric--Well done on the structure. I like that.
I get what he is saying Dave. I have a saltwater aquarium and I put a refuge in my sump where little pods and good algae can grow. Pods can grow in there and not have to worry about getting eaten by the fish in the display until I take the algae out and throw it in the display and then the fish go to town.
