Sankaku Channel/

^It was deleted because pools aren’t made to be used like that. You can find those images with an image search, so they don’t belong in a pool.

From System, bad pools:
“Consisting simply of personal favourites (users should use their favourites)
Being mostly or completely replicable through tag searches
Being empty
Not having any clear purpose
Being marked as "test" or otherwise”

Good pools:
“The ideal pools are ordered sets of posts or collaboratively edited collections of posts.”