Algimycin Winter Algimycin Winter GLB Enjoy a simplified approach to seasonal algae protection. GLB® Algimycin® keeps swimming pools algae-free all winter long and ensures a hassle-free opening in the spring. Continue Search Chemicals by Brand Pool Chemicals Spa Chemicals See Also: Splash Alkalinity Plus Blue Phosphate Remover The Iron, Colbalt & Spot Etching Stuff