Little update:
I ended up canceling some of my CUC order b/c hermits needed faster shipping so I just bought the ceriths and nerite snails. Along with the clownfish I had, I added a Hardwicke wrasse, six line and a fairy wrasse.
When I added the snails to the DT all was great for the first 5 min. Then as the cerith snails started climbing up the glass, the Hardwicke picked them off and ate them. So in the matter of a day or 2 all my cerith snails were gone. It never messed with the bigger snails.
I decided I wanted to get some hermit crabs so I went to the local Petco and got 3. Once again everything seemed great for the first couple days. Then on the 3rd day my wife texted me and said 2 of the clowns died. We noticed the fairy wrasse started showing some spots the night before but everyone was normal. After 2 more days all my other fish died. After reading through the disease thread, it looks like velvet came from the hermit crabs. I tested water parameters and they were all 0.
Trying to look on the bright side so I get a chance to start over. I wanted some cleaner shrimp but with the Hardwicke in there it would have been impossible. I am going to pick up a couple shrimps tomorrow and start the fallow process. Good learning experience for sure