Blue green algae
BLUE green algae, also known as Cyanobacteria, are a group of photosynthetic bacteria often referred to as “pond scum”.
The algae is most often bluegreen in colour but can also be blue, green, reddish-purple or brown.
It generally grows in lakes, ponds and slow-moving streams when the water is warm and enriched with nutrients like phosphorus or nitrogen.
It can pose risks to humans if ingested including causing skin irritations and sickness.
Dogs are more at risk of falling sick from swallowing the algae and it can cause them to die.