Red Slime Algae Care Guide
Cyanobacteria sp. · Saltwater algae
What Red Slime Algae look like
Slimy, mat-forming coating in deep red, maroon, or dark purple hues. Peels off surfaces in cohesive sheets. Produces a distinctive musty odor. Can form on sand, rock, and coral bases.
Behavior & temperament
Not a true algae but photosynthetic bacteria capable of nitrogen fixation. Thrives in low-flow dead spots with elevated organics. Often appears in tanks with poor water circulation and excess dissolved organics.
Behind the name
Named for its red coloration and slimy texture. Identified by its sheet-like growth and characteristic smell.
Plan your tank
Check the numbers before you buy: tank volume, salinity, salt mix, water changes, and your ongoing care routine.
Keeping Red Slime Algae?
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