Pet Fountain Filter

FIG. 1 is a bottom, front, left perspective view of a pet fountain filter showing my new design;

FIG. 2 is a top, back, right side perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines in the drawings depict portions of the pet fountain filter that form no part of the claimed design.

The dash-dash broken lines illustrate portions of the pet fountain filter. The dash-dot broken lines represent the bounds of the claim. The broken lines form no part of the claimed design.