Currently I am beginning to raise angels. I have one breeding pair but hate culling the slow growing/deformed offspring. Instead of just putting them in clove oil I am thinking of getting an aggressive cichlid that can do my dirty work and get a live meal at the same time (since my puffers won't eat the angels). I have 1 30g that is empty to use (I know most require 50g min.) Is there any cichlids that are aggressive and will stay relatively small (would work as only fish in the 30 g)?