This subject is very easy, a good monitor cage is anything the allows for the needs of monitors and encloses the monitors, anything. The cage, should include the elements of parts 1 thru 4. The best cages are versitile, they can be changed and rearranged to first meet the changing needs of a monitor and second, to work with many types of monitors. F
ps. the picture is of my turtle pond, its totally artificial.



Michelle