No, plecos won’t eat fish poop. Despite being a popular cleaner fish, plecos don’t eat poop because fish poop is already processed and contains very few nutrients.
Additionally, you can’t even rely on plecos to keep your tank clean because they are big fish and produce a lot of waste themselves. If you have plecos, make sure to keep your tank clean by:
- Installing a good water filter
- Changing 10% the water once a week
- Cleaning the tank at least once a month
- Not overfeeding the fish
- Testing the water regularly