Cories should, I say need sand. If it was up to me don't get them as gravel can injure their barbels and casue infection leading to death if not cared for. Shrimp are hit or miss and if you want a clean up crew they won't do anything, you will just have to feed more things, which makes you gotta buy more food.
How about doing something called research? If you are going to get an animal can you at least know what your gonna fees it or have to feed it (No offense). Ghost shrimp are scavengers and need meaty products, no algae for them. So toss those out of your head if you wanna feed them algae.
Why do you want a "clean up crew" in the first place?
15 Gallon NPT
1g no tech bowl in the making
Last edited by kfryman; 07-01-2012 at 04:37 AM.