5g Suggestions

[channing]

do female bettas. they could handle the current and you'll have lots of color

 

[stang1]

The female Bettas couldn't stand such a strong current either and even if they could, you would only be able to house 1 in that size tank.

 

[dthoffsett]

What about celestichthys margaritatus, I know they like well planted tanks, but could they handle the current?

I think Endler's Livebearers would also work.

Or you could set up a really neat shrimp tank.

 

[Musho3210]

simple, make it a saltwater tank (but you wont have fish in there for saltwater....)