Adding Guppies to a tetra tank

[garfy]

Ok so I have a 25 g Tetra tank.

Rummy nosed Tetra
Glowlight Tetra
Harlequin Rasboras
Small group of cory Cats

My question is would it be ok to add guppies to this tank? My concern is the Guppies tails being nipped.

 

[Anthym]

Similar to my current setup. I haven't seen any fin nipping to date