Multifunctional Algaecide 1) Copper+BKC Product Code:HCal3001 2)PQ+BKC+Copper Product Code: HCal3002 Multifunctional Algaecide1) Copper+BKCProduct Code:HCal30012)PQ+BKC+CopperProduct Code: HCal3002Features: Used for the treatment of severe, resistant algae strains such as Black Spot. The ideal solution for blue, green, mustard and black algae infestations.Size:0.5L, 1L, 5L Bottle and etc.