Power SI Bloom 5 LiterIf you're looking to improve the strength of your plants Power Si is one of the best non nutiritonal amendments you can use. Power Si is unlike other silicon amendments, it works quickly and well. Adding Power Si to your nutiritional regimen results in noticeably thicker& stronger stems. Power Si works as a transport agent bringing nutrients from your root zone to the rest of your plant. You'll notice improved stregnth and vigor as Power Si works