Well, I added all my plants and snails on the same day around 2 weeks ago. If it came with a few extra snails, I think I would have spotted them by now so I'm pretty sure its a nerite. I also haven't added anything to the system since then.
Also as you may or may not be able to tell in the photo, it has a very small olive colored shell just like the fully grown olive nerite's. It looks exactly like them except a baby version, lol. From what I can tell there is just one of these babies in the tank but I'm keeping my eye out for more.
Also, my PH, Ammonia, nitrate, nitrite levels have all been normal.. nothing out of the ordinary. I'm going to test again today though.
20g NPT sorority- Clarissa/CT, Ellianya/CT, Tessa/CT, Derpy Fins/CT & 5 Olive nerites (all named Gary)
Swim In Peace - Asteroth, Teressa, Apple Bloom