^^ Everything he said, tetra's can be quite sensitive and will die if you add them before the tanks fully cycled, I'd buy them from a reputable local store vs petco/petsmart everytime I've bought neons from one of the big box stores they've died with in a week.
When you add shrimp make sure you got your decor taken care of they'll want some places to hide and climb, rocks, fake or real plants.
When you add shrimp make sure you got your decor taken care of they'll want some places to hide and climb, rocks, fake or real plants.