£31.85
Rebranded From Fi Clor
HTH Blackal Shock Algaecide is a complex, high dose Copper Based Algaecide. It is specifically designed to destroy chlorine resistant algae, such as Black Algae, Mustard Algae and Pink Algae, without using a chlorine shock treatment.
Warning – this product should not be overdosed: maximum use is once every three months
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