What are the red spots in my aquarium?
Red Slime Algae Cyanobacteria are reddish-brown in color and first appear in your aquarium in small clumps or patches. If left untreated, the algae will spread and form a thick, slimy layer across your entire aquarium.
Can fish recover from red gills?
If fish do not suffer severe bacterial infections following ammonia burns, then they usually recover well and can be reintroduced into the tank within a week. Fish with advanced infections or those that are exposed to rapid rises in ammonia levels may die.
Will red algae hurt my fish?
Like other live plants and algae in aquariums, red slime is happy when the lights are on and create lots of oxygen through photosynthesis. However, when the lights go off, algae will use oxygen dissolved in the water to survive. If there is not enough oxygen to go around, your fish could be at risk for asphyxiation.