“BLACK ALGAE SHOCK/ TRI-CHLOR GRANULES 90” has been added to your basket. View basket Previous Product Next Product PHENOL RED 1/2oz $697.08 100 in stock PHENOL RED 1/2oz quantity Add to basket SKU: PEPR161018 Category: CHEMICALS Tag: CHEM Related products CHEMICALSALKALINITY INCREASER $1,918.20 Add to basket Quick View Quick View CHEMICALSBRINE CRYSTALS $1,900.00 Add to basket CHEMICALSGRANULAR CHLORINE – AQUAFIT 100LB $37,800.00 Add to basket