First Choice Keep Clear Algaecide 32 fl oz$34.99 First Choice Keep Clear Algaecide 32 fl oz quantity Add to cart SKU: CH-FC-F042001012FC-0034099-1 Categories: Algae Control, Algaecides, Chemicals, First Choice, Water Treatment Description Description Cost-effective preventative algaecide. 50% Ammonium Quat formula, works well against green and blue/green algae. First Choice Chlorine Sanitizer 25 lb Pail $144.99 Add to cart First Choice Chlorine Sanitizer 5 lb Pail $79.99 Add to cart First Choice Clear-Out Extreme 1.5 lb $23.99 Add to cart