Looks like you're looking for something like Sera O-Nip tabs.
I've never had that much luck with freeze dried worm cubes. They always either pop up, or the fish pull them off, but regardless, there's usually some amount of floating worm cube in the tank. Nothing wrong with it, but it just doesn't stick as well as I'd like it to.
So many fish/plants/inverts to keep, not enough aquaria.