Biozym Algaecide for Koi Pond is a 500g pond treatment that knocks back green water, string algae and blanket weed and restores clarity. Algae shows up in any water feature — ponds, aquariums or fish tanks — but this formula is made for koi ponds, where it clears the view without harming the fish.

Used as directed it is safe for koi and other pond fish, a practical seasonal treatment through the growing months.

Good to know:
– Size: 500 g
– Targets green water, string algae and blanket weed
– Safe for koi and other pond fish when used as directed
– Seasonal treatment for the growing months