I think some people consider a cleanup crew to mean eating excess food, while others mean they want detritivores. Like was mentioned, Corys and other "clean up" fish should not rely on scraps to survive - they should be fed like any other fish.
125 - BGK, pictus cats, silver dollars, kissing gouramis, palmas bichir, delhezi bichir
125 - Red severum, bolivian rams, Turquoise rainbows, irian red rainbows, loaches (angelicus, zebra, kuhli and horseface), plecos (BN, RL and clown), denison barbs, pearl gouramis
90 - Congo tetras, african knife, elephant nose, spotted ctenopoma, upside down cats
QTs - 29, 20H, 20L, 10