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Simple Ways to Prevent Red Slime Algae (Cyanobacteria)

How to Prevent Red Slime Algae in Marine Aquariums

Red Slime Algae are unsightly, aggressive algae commonly found in many saltwater aquariums. Though they are commonly referred to as algae, they are not "true" algae, but are cyanobacteria. These microscopic organisms thrive in underwater environments where excess nutrients and poor water conditions are present.

Red Slime Algae 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.

To prevent nuisance Red Slime Algae from overtaking your aquarium, routine maintenance is extremely important. Here are some simple steps you can take to reduce excess nutrients and organic debris, which play host to Red Slime Algae:

Red Slime Algae are an annoying addition to your aquarium, and once present, a challenge to eliminate. The best way to deal with Red Slime Algae is prevention. With a regular maintenance regimen, you can help keep your aquarium beautiful and algae free.

Question:
I noticed patches of red velvety material on the substrate of my saltwater aquarium. What is it?
Answer:
It sounds like you have the beginnings of Red Slime Algae. If left untreated, these patches will grow into an unattractive velvet-like blanket.
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