well for shrimp a lot of people say it's bad and then some others say it's not so I've heard it's bad because it is high in thiamine. As far as other pellets I can't really list any others cause there are so many. Almost anything hikari makes is good, NLS (New Life Spectrum) I've heard is pretty good. I personally have only used hikari not because I don't want to use the other, but because the other are available locally for me. Something I do is when I am looking for hidden pellet (some random pellets I may find in my LFS) I see if they are pellets, see if they are sinking, and then look at the crude protein. As long as the crude protein isn't too low I'll end up buying and trying it out. As far as exotic tank mates there are a good amount, but it'd narrow them down depending on your tank size.