My story is more like the original posters. In other words it was minor.
So in an effort to get a good pic of my Betta I put a cloth over the back of the tank. Later that day I notice that the dresser the tank sits on had a lot of water on it. It turns out the cloth must have been in contact with the tank water and was pulling water out of the tank. The problem was quickly fixed but it gave me a scare.
So in an effort to get a good pic of my Betta I put a cloth over the back of the tank. Later that day I notice that the dresser the tank sits on had a lot of water on it. It turns out the cloth must have been in contact with the tank water and was pulling water out of the tank. The problem was quickly fixed but it gave me a scare.