I've got a 15 gallon that houses tangerine tigers, blue neocaridinas, an amano, and currently a few threadfin rainbowfish. It's a pretty heavily planted tank. The thread fins are pretty tiny and supposedly their throats are even smaller than their tiny mouths, so I'm hoping it should be ok. Anyone else have experience with this type of combo?
You can sort-of see them here in this blurry iPhone video screen shot: