cool thanks! I thought it was a very cool idea to have, since it's totally different. They told me one clam per 20gal so it'd be too much for a standard betta tank anyways. I did think about it for my main tank though.
Betta: Cleo - SD
Other fish: Golden Gourami, Black angel, Clown loach, Corydoras, Danios, bristlenose pleco