I'm not a cleaner

When it comes to setting up an aquarium, many novice aquarists turn to fish and invertebrates with the belief that they can act as "cleaners." Corydoras, Ancistrus, Plecostomus, Otocinclus, Siamensis, and snails are often purchased not for their beauty or behavior, but for their supposed ability to keep the aquarium clean. However, this idea is partly a myth. In this article, we'll explore the true role of these animals in the aquarium and how to care for them according to their needs.

"Cleaning" Animals: Who Are They Really?

Corydoras: The Little Explorers of the Deep

Corydoras are small bottom-dwelling fish known for their lively behavior and the way they "scrape" the substrate in search of food. They don't feed on garbage or dirt, but on uneaten food scraps, microorganisms, and occasionally algae. Adding them to an aquarium simply to clean the bottom is a mistake: they require a balanced diet that includes sinking tablets, live or frozen food, and vegetables.

Ancistrus and Plecostomus: The Algae-Eaters Par Excellence

These fish, known for their sucker-like mouths, are among the most popular for algae control. However, their dietary needs extend far beyond algae. Ancistrus, for example, enjoy zucchini, cucumbers, and other fresh vegetables, while plecostomus (especially the larger species) require a varied diet that includes protein. Furthermore, plecostomus can grow very large, reaching a size unsuitable for small home aquariums.

Otocinclus: The Little Specialists

Otocinclus are delicate fish that feed primarily on fine algae and biofilm. They are very efficient, but require a well-established aquarium with a good amount of natural algae and stable conditions. They cannot survive long if used as the sole "solution" for algae control.

Siamensis: Allies Against Filamentous Algae

Siamensis, or "Siamese algae eaters," are known for their effectiveness in controlling filamentous algae. However, they also require a balanced diet that includes commercial food, vegetables, and occasionally protein. Furthermore, they are active and social fish that require space and companionship to thrive.

Snails: The Aquarium's Scavengers

Snails such as Neritinae, Ampullaria, or Planorbidae are often introduced to remove algae and debris. While very useful, they cannot be considered a complete solution: they also have specific dietary requirements and contribute to the aquarium's biology with their waste.

Because They're Not Just Cleaners

The idea that these animals can keep the aquarium clean on their own is misleading. Every aquarium requires regular maintenance, including water changes, siphoning the bottom, and cleaning the glass. These animals, while useful, cannot replace the work of the aquarist.

Furthermore, treating them as mere "cleaning tools" ignores their specific needs. Each species has unique requirements in terms of space, water parameters, diet, and compatibility with other fish.

How to Take Care of Them

Varied Diet: Provide specific food for each species, avoiding making them dependent only on leftovers.

Suitable Aquarium: Make sure the aquarium is of appropriate size and parameters for the species.

Companionship: Many of these animals are social and live best in groups.

Regular Maintenance: Don't rely entirely on them for cleaning; a healthy aquarium depends primarily on your care.

Corydoras, Ancistrus, Plecostomus, Otocinclus, Siamensis, and snails aren't just "cleaners." They are fascinating creatures with unique behaviors that deserve respect and attention. Treat them as full members of your aquarium, not as quick maintenance solutions. Only in this way can you create a truly balanced and satisfying aquatic ecosystem.

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