The ornamental design for a circular tubesettlermodule, as shown.
FIG. 1 is a perspective view of a circular tube settler module showing my
new design;
FIG. 2 is a top plan view thereof; and,
FIG. 3 is a front elevation thereof.
The bottom plan view is essentially identical to the top plan view and both
side elevations along with the rear elevation are essentially identical to
the front elevation.