[NATIVEVAMAN]

The "snail" without the shell is probably some type of slug or nudibranch.There is a good chance it is not a good thing.Catch it and take it to the lfs for ID if you can.
The little green "orbs" are a type of algea that you dont want.Remove it useing a turkey baster,but do not pop the bubble or it will spread like wild fire.The little white things are "pods" they are good free fish foodThe little white things do not turn into silver things or hermit cabs.