Do fish eat poop?

🐟 Most fish do not eat poop – they may mouth it or investigate, but they spit it back out.
🧹 Bottom feeders (like plecos, corydoras, and loaches) are often mistaken for “poop-eaters” because they sift through gravel where poop collects. In reality, they are searching for 🍽️ leftover food, 🟢 algae, or tiny microorganisms—not digesting waste.
🐌 Snails and shrimp may climb on poop, but again, they’re picking at biofilm or leftovers stuck to it, not eating the waste itself.

🚫 No – fish cannot survive on poop.
💩 Fish waste = indigestible material + toxins like ammonia.
🥀 Relying on poop would cause malnutrition, stress, and eventually death.
✅ Fish require a balanced diet: flakes, pellets, live/frozen foods, veggies, or algae wafers (depending on species).

👀 Fish sometimes pick at poop, but they’re usually:
- 🟢 Searching for algae.
- 🍽️ Looking for uneaten food nearby.
- 🧩 Investigating out of curiosity.
Since it happens around poop, many assume the poop itself is being eaten—but it’s not.

While nothing eats poop directly, these are your “clean-up crew” for leftover food and algae:

👉 Bottom Line: No fish or critter survives on poop—it must be removed with regular 🪣 water changes and a 🧽 gravel vacuum.

💩 Plecos do not eat poop. They may push it around while searching, but they aren’t digesting it.
🍽️ If your pleco is surviving without you feeding it, it’s most likely eating:
- 🟢 Algae growing on the glass, rocks, and decorations.
- 🪵 Biofilm and microorganisms growing on driftwood and other surfaces. Some specialized plecos also rasp and consume wood as part of their natural feeding behavior.
- 🍤 Leftover food dropped by other fish.

🌱 In a newer or very clean tank, algae/wood alone isn’t enough.
🥀 Plecos that aren’t fed properly can become skinny, weak, and sick, even if it looks like they’re “eating something.”
⚡ They also need variety (vegetables + sinking wafers) for long-term health.