JulieC said:
Lots of people hate hybrids, but I don't so I'll suggest this one...
You could have a single blood parrot. They are colorful and have tons of personality.
But 30 gallons is the minimum for these guys as they can get to be up to 8" (if the breeding is right).
it would be ok in a 30 if it was 1) by itself and 2) if it waas there temporarily. they will eventually need a 50 gallon or more because they do get to be around 8-10 inches long,and there are three strains of them and they all get to different sizes.
there are the jelly bean (bubblegum) parrots, which are a cross between a blood parrot female and a convict male (has a convict head on a blood parrot body with a slighly straighter spine) and they get to 4 inches, but have dad's bad attitude.
there is the "classic" blood parrot, which is a hybrid betweed two american cichlids, and gets to about 8-10 inches long and has a curved spine, and its mought can be set in place, but they do in fact gain the use of their moughts as they grow, and by the time they are full grown they have full use. they are fairly passive except when they "breed" (i say this because only a small percentage of males are fertile, while about 75% of females can produce young, hense the two other strains)
then there is the King Kong parrot, which grows to be about 12-14 inches long, and is a cross between a Midas cichlid and a blood parrot. they are usually hard to find, but they are generally peaceful, and have a longer profile compared to the blood parrot.