Horizon Scum-Ball
HELPS ELIMINATE THE FORMATION OF SCUM LINES AND REDUCES FOAMING! Place the Scum-Ball in your pool skimmer (fits all types) or free float it in your spa. It is round so no need to flip over. The Scum-Ball" helps to eliminate the formation of a scumline. Under normal conditions, the Scum-Ball should last an average swimming season or 3 months in a spa.
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