Pond One Algae Blocks are ideal for clarifying green pond water, this block is best used as a preventative, when algae first appears or after cleaning an algae infested pond. Repeat use only when algae reappears. To prevent oxygen depletion, remove heavy algae growths mechanically before treatment and aerate the water after use.

Suitable for fish, but must not be used in ponds with aquatic plants.

Dose:

Blocks will dissolve over 7-14 days
Each complete block treats approximately 800 litres (200 litres per cube)

How do I calculate the volume of water in my pond?
Multiply (in metres) the average length x width x depth x 1000 = volume in litres