Kremdelakrem

I've never used swords as feeders, what I tend to do is keep several guppies in with Angel fish, and gouramis, and rainbows, and let them eat the offspring directly (taking into account the adults are picked on so the tank has to be well planted. I always thought swords were a bit too valuable to use as feeders, but supply and demand, and you have a supply, so the demand is low, so why not? If you keep them around and crowd the tanks, that can only lead to bad things. So go for it if you have the stomach.