
HTH Blackal Anti-Algae Shock kills all types of algae and prevents them from reappearing.
HTH Blackal Anti-Algae Shock kills all types of algae and prevents them from reappearing.
Kills all types of algae and prevents them from reappearing. Contains copper, making it effective against even the most resistant algae (mustard, black and pink algae etc.). Contains a special copper formulation that prevents coloration of linings and bathers' hair.
Against algae infestation or to eliminate very resistant algae:
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