Algae in Aquariums: Causes, Common Types, and Effective Solutions

Why does your aquarium have algae? Unfortunately, that’s a question new – and even experienced – aquarium owners ask themselves often.

Algae can quickly spread in aquariums, covering surfaces, obstructing views, and competing with aquarium plants for resources. Different types of algae, like green hair algae, black beard algae, and brown diatoms, grow in various conditions. Each type needs its control method. To keep your tank healthy and aquarium plants looking good, it’s important to understand why algae appears.

So why does algae appear in aquariums, what are the common types, and how can you eliminate it?

The 3 most common reasons aquascapers struggle with algae are 1) a lighting imbalance, 2) excess nutrients, or 3) poor water circulation and quality. If you want to learn how to get rid of algae, keep reading!