Brown algae in aquariums: What causes it, how to remove it, and prevent it from returning

New aquarium owners often face a common issue: a dusty brown film on surfaces. This isn't true algae but diatoms, microscopic organisms thriving in unstable water conditions with excess silica and nutrients. While harmless, they mar aesthetics. Effective removal involves manual cleaning and siphoning, with prevention focusing on stable water chemistry, proper lighting, and regular maintenance.

Brown algae in aquariums: What causes it, how to remove it, and prevent it from returning
New aquarium owners often face a common issue: a dusty brown film on surfaces. This isn't true algae but diatoms, microscopic organisms thriving in unstable water conditions with excess silica and nutrients. While harmless, they mar aesthetics. Effective removal involves manual cleaning and siphoning, with prevention focusing on stable water chemistry, proper lighting, and regular maintenance.