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