The shrimp died before I reset the tanks. Before the shrimp died I did a 50-60% water change because the shrimp was acting off and there were dead snails in the water, I left him in the tank for another day but he was still acting weird and he wasn't eating or moving so I put him in the QT so if he did die it would be easy to scoop him out and it was easier to monitor him in the QT. The QT was established with pre-existing water from that tank. He died roughly 2-4 days later. He never moved, was super skittish and hid (he used to attack things and scouted them out), and stopped eating completely.