Algae usually finds its way into pools through the air in the form of spores. these will setle on the sides or the botom of the pool and start growing in the same way as weeds can invade the garden.
The plural of alga is algae. The plural possessive is algae's.
Brown algae
Until recently, Cyclospora was considered to be a form of algae
they form lichens
brown algae
Some plankton do eat algae. Phytoplankton are a form of algae, and some zooplankton are consumers of phytoplankton.
The plural for algae is actually just algae
brown algae
brown algae
Brown algae
Plant form
some fungi and algae combine to form lichens[li kenz]