Cori Elizabeth
Yes I've heard they can be transferred into a fully salt water environment, that'll be a fun experience Are there any fish you would recommend for stocking a tank that size?Honestly, for a small setup, you need everything you would need for a freshwater setup, plus live rock/marine salt/hydrometer. I notice some Mollies in your profile picture, it might be interesting to you to know that they can be transitioned fully into salt water.
So to avoid over stocking, how many fish would you put in there?Here's a short list off the top of my head(don't put all of these in there):
Royal Gramma
Shrimp Goby pair
Clownfish pair
Tailspot blenny
Firefish
Zebra Barred Dartfish
My favorite saltwater fish are Clownfish because they always seem to have a sassy attitude and poke your arm when you scrub the tank.