Just out of curiosity... 5.5 Ga with snowball shrimp and betta? Doesn't the betta munch away at your shrimp pop? I never tried housing neocardinia with my first betta (who was agro to other fish, but cool with the amanos) but my 2nd betta cheerfully cornered and then tore into the first cherry shrimp i ever owned. I now keep a seperate shrimp tank, but part of me wonders if it was the size of the shrimp that made him attack, or the red?