Clearance and closeouts - Poolstore.com.Some of these pool supplies on sale have been discontinued, some are on seasonal clearance and others are simply overstock that we are clearing out. . Closeout Price! Spring Treat Algaecide for use when opening swimming pool in the Spring. $13.99 $7.99. Picture of Activate by Rendezvous - 2.2 lbs - 106696A.