One issue you have depends on whether or not the rainbows are, or become, a pair and start to spawn. Same with the parrots , and additionally, if they are red parrots, they will get quite large as someone else indicated. Based on what you've said, I would caution you about adding anything to the tank; you may already have fish that will exceed the tank's capacity. Were the parrots not there, I'd suggest Honduran red points as a possibility, but that would assume no pairs form.truck_317;2089842; said:i have a 55 gallon tank with 2 rainbow cichlids, 2 silver dollars, 2 parrot fish, and 6 other small community fish
Someone else suggested clown loach, but they eventually grow large (12"), really need to be in small packs (3-5), and make short work of any food that hits the bottom - Your other fish either need to feed from the top or on the way down, because they ain't getting food from the bottom!
Again, imo your best bet is rainbows with hrp, but no pairs. Then fill in with colorful dithers (swordtails for example). Gives you yellow, blue, red colorations in the tank.
Also anyone that has kept any before should tell you same thing.