The majority of algae live in aquatic habitats. The word “aquatic” is almost limited in its ability to encompass the diversity of these habitats. These organisms can thrive in freshwater lakes or in saltwater oceans.
I thought only in saltwater?
Thick layers of algae, called algal blooms, may form when nutrients like phosphorus and nitrogen build up in the water in amounts in excess of naturally-occurring nutrients. Fertilizers, pet waste, improperly functioning septic tanks, grass clippings, leaves, and other yard wastes are all sources of nutrients.
That is why… It’s clear now.