is it cycled yet? are there fish in it yet? try some male mollies, they have some of the widest varieties of colors and are easy to care for, i suggest males though, cause if you get females, they may already be pregnant, or if you get males and females, the will have tons of babies.
you could get three yoyo loaches to help eat the extra foods, they will need some sinking food wafers in addition to flake food but are really cool and fun and the design on them spells yoyoyoyo