I've had my BGK for over a month now and don't notice a big change in size, anyone keep them before know just how fast they grow? Mine is just a baby at about 2-3 inches maybe. I feed it primarily blood works but I've seen him pick up on flakes that I feed to the tetras in the tank. I feed it a pretty generous amount of worms as well, I'd say probably 20 or so, once a day.