This is my BGK, when I got him he was about 3 inches, he got lost in a planted tank, and when I found him again he was 7 inches or so now. I rarely see him, but every once in a while I see him dragging a shrimp pellet into his hide. He also eats algae wafers at times.
Here is my BGK - he is around 2 1/2 years old and about 9 to 10 inches long . Sorry for the quality of the pic - just sorta snap a couple while I was feeding the tank .