“ALKALINITY INCREASER” has been added to your basket. View basket Previous Product Next Product RETAIL BLACK SHOCK/ TRI-CHL – 4LBS $2,600.00 100 in stock RETAIL BLACK SHOCK/ TRI-CHL - 4LBS quantity Add to basket SKU: PCBA4LBSR Category: CHEMICALS Tag: CHEM Related products CHEMICALSALGICIDE $1,725.00 Add to basket CHEMICALSTRICHLOR CHLORINE TABLETS $2,875.00 Add to basket CHEMICALSBLACK ALGAE SHOCK/ TRI-CHLOR GRANULES 90 $2,990.00 Add to basket