The ornamental design for a pondfloat, shown and described.
FIG. 1 is a perspective view of a pond float, showing a top, a front and a first side;
FIG. 2 is a top plan view of the pond float;
FIG. 3 is a front elevational view of the pond float, with a left port for a center chamber open, a right port for an outer ring chamber open, and the top facing downward;
FIG. 4 is a bottom view of the pond float;
FIG. 5 is a rear elevational view of the pond float;
FIG. 6 is a first side view of the pond float with the front side facing upward; and,
FIG. 7 is a second side view of the pond float with the front side facing downward.