IMO, I would see if you can find Cherry Shrimp. They have color, look better than Ghost Shrimp, require the same needs, and does the same job as Ghost Shrimp. But pick some up cause they will clean up extra food.
Mystery snails are great. With a Snail/Shrimp combo you will never see algae on the snails shell(it happened to me, dont ask lol).
Petsmart has them in with Female Guppies and Zebra Danios over here lol. I would think they would just throw them in the tank. But they sell quick.