I bought a tank the other day that had a watchman goby and 2 damsels in it. I moved the watchman goby into my other tank because there is a pistol shrimp in there ( I think, haven't seen him in a week) . Anyway, the other fish in this tank are 2 nemos and 2 blue/green chromis. They pretty much eat all the food before it gets down to the goby. The goby doesn't even try to go up to get anything. What do I do to keep him from starving?