I don't know about putting them in your tank, but you may wanna try this...
2 dozen cherrystone clams
2 TBL.chopped parsley
3 cloves of garlic
1/4 cup of olive oil
1/2 cup of water
dash of salt and pepper
scrub clams clean.Heat oil in a large pot with cover.Add garlic, and parsley, and simmer for a few minutes.Add water,salt, and pepper.Add the clams,cover pot, and steam over medium flame untill the clams open, and remember to discard any clams that don't.Place the clams in a large bowl, and pour the broth over them.
ummmmmmmmmmmmmmmmmmmmmmmm gooooooooood!