Flipped Upside Down Nerite Snail?
You may look at your aquarium and see that your pet nerite snail is flipped upside down and its shell is on the substrate while its body is exposed. This is a common problem with nerite snails.
Nerite snails have a difficult time flipping upright and sometimes its impossible for them to get upright. Immediately flip your nerite snail upright because if left too long they could die.