54 Litre Stocking.......................again

[bullgoose]

Hi,
 
 I had decided to just stick with my 4 guppies and add some cherry shrimp later but just feel the tank needs something else before i will be happy .  I would really like some type of cory or something to scuttle around the bottom. Problem is i read corys do not like gravel substrate, is this all corys or is there a type that are good with this ?
 
My plan for the final tank now is 4 guppies, cherry shrimp, couple of snails and 6 corys (if they can go with gravel)
 
If not the corys is there anything else good for a tank of this size that scuttles around the bottom

 

[Megalodon]

maybe some otos.... they don't necessarily live at the bottom,more like side of glass,under driftwood...but they are super cute and small.

 

[Elrohirthehasty]

^And otos are the only 99.9% guarantee of no problems with the shrimp.  (Tho guppies and corys are fine.)