Red Algae
Red algae can give the water a red or reddish brown hue but can also be green.
Read MoreCyanobacteria
Cyanobacteria are toxic bacteria that look like blue green algae: mats of green, blue, brown, or purplish red floating on the water.
Read MoreBlue Green Algae
Blue green algae can be green, brown, or reddish purple looking in the water.
Read MoreMuck
Muck is made of decomposing organic material, can be brown to black, and have an unpleasant odor.
Read MoreExcess Nutrients
Excess nutrients can make the water look cloudy, murky, or muddy.
Read MorePlanktonic Algae
Planktonic algae look like pea soup or spilled paint.
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