• Unpleasant smell and mold

  • Whitney

A week ago, I noticed an unpleasant smell and some mold on the walls of the aquarium - above the water. This has never happened before. Why did this start? And what should I do? Please share your experiences.

Jennifer9100

Without a detailed description of the aquarium and photos, it's unlikely that anyone will respond to you.

Mario

Most likely, it's a bacterial film. It's hard to determine without a photo.