Hello, about a month ago I purchased a 2 inch marbled sleeper goby, I set up a 45 gallon growout tank for him with plenty of hiding spots, anyways a month later he hasn't grown an inch, hasn't eaten a pellet( I've tried several brands) I even went to the store to pick up some very small feeder platies thinking it would spark his appetite but he cant catch one if his life depended on it lol I was really excited about getting this goby because I had wanted one for awhile but it's been nothing but disappointement, any advice of getting him to eat or adjust better At this rate he will be 2 inches for the next year lol