i am a HUGE fan of rainbows. my first tank had australian rainbows and trifasciata rainbows, all grown from less than an inch to 3+ inches. with proper food they just glow. be warned though, my dominant australian would once in a while pick at my water wisteria. other than that they didnt bug anyone or my plants. they will chase small creatures for a while, but once they realise they cant eat them, they will leave them alone.