Worms? Leeches?

  • From zooming into the photo, those are planarian (basically little worms that are harmless but have the appearance of a tiny white leech). They are not snails who left their shells (no freshwater snail does this), and they are not harmful.

    You have them naturally as they are attracted to excess waste/food being in the tank. I’d recommend feeding about half of what you currently do and they will reduce/disappear (from above the substrate level) once that is done.

  • If you want to reduce the food waste build up in the tank. Would suggest you to introduce fish such as sucker fish into your aquarium to keep the fish tank clean and to clear the left over food in the tank. This would gradually bring down the level of snails and other bottom feeders in the tank.

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