We got an algae eater yesterday from petsmart, and there was a bit of detritus in the bottom of the bag. My daughter released them, then noticed later that evening that one of the pieces of gravel from the bag was moving
It's a snail of some kind...too tiny to take a pic of with our cameras. White conical shell, half the width of my pinky nail. There were mystery snails in same tank but this looks nothing like the mystery snail. Almost looks what I believe is called a periwinkle shell that you find in the ocean.
Ideas and recommendations?

Ideas and recommendations?