I read a book by a guy who stocks his tanks with tubifex worms to provide the substrate and plants with aeration and to provide food for hungry fish hunting around for a live meal. Has anyone here ever tried something like this, and if so, where in the world would one get tubifex worms? Also, I'm thinking you would have to keep stocking them somehow or give them refuge somehow to keep the fish from eating til they pop. Talk wormy to me!