Hi everyone,
Thanks a lot for all of your responses. I am not sure if the two shrimp that are missing could be molting as I don't know much about shrimp behavior just yet.
I have looked all over the tank for them except for one place. I have the Fluval Edge Zen Wall in my tank and they could easily be hiding in behind. I can't really take it out to check as it houses two of my plants. Here are a couple of pictures.
Could my Guppies/Tetras have eaten them?
I think the shrimp are most likely just hiding because they are new to the tank. I didn't realize they were shy animals.
I'll keep you guys posted if anything new happens.
P.S. Any clues as to why the hair algae is not being eaten?
Thanks again for all your help!