This invention involves {HEAD ~ the presence} of microvoids in the second coating of the granules to enhance the migration of {TAIL ~ algaecides} contained in the first coating thereby providing increased algicidal activity on the surface of the granules 
This invention involves { HEAD ~ the presence } of microvoids in the second coating of the granules to enhance the migration of { TAIL ~ algaecides } contained in the first coating thereby providing increased algicidal activity on the surface of the granules
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH