Use Suncoast Chemicals Extended Algae Control 3 Month Algaecide as an effective algae treatment to kill algae and prevent algae growth. Extended Algae Control algaecide kills and prevents blue-green, black and mustard / yellow algae. Perfect for pools in hot, humid climates. Active ingredient: 11.8% Copper Sulphate Pentahydrate.

  • Single algaecide treatment lasts 3 months
  • Simple to use
  • Non-foaming 
  • Non-staining (Note: Balance pool water before using Extended Algae Control)