On the pods issue I did a lot of research on how a pod could get from the refugium to the display tank. Evidently, these are really tough little guys. Also, in the microscopic level the "shear force" of the pump just does not apply to these guys. Kinda like when a small bug drops out of a tree. Even though it can't fly, it doesn't really get hurt. Larger amphipods might get torn up in a pump but that just makes for minced fish food.