Get the best results from your herbicides and algaecides by using a surfactant. Surfactants help stick your chemical herbicides and algaecides to the plant. Plex Mate will also break down the waxy coating on aquatic weeds to allow more effective penetration by algaecides and herbicides. Our Plex Mate surfactant is used when treating floating and emerged weeds and surface algae. Plex Mate is available in three sizes 8 oz, qt and gal.