I purchased a yellow watchman goby 10 days ago from LFS. It seems to be doing well, but I am worried about how much it is getting to eat. They told me I did not need anything to supplement its food, that it would just eat what was on the bottom. In reading books, one thing I do my very best not to do is over feed my fish, so not much if any pellets are falling to the bottom for it to eat. Occasionally when I feed it comes up and is searching for food sinking to the bottom, but my other fish always get to it first. Should I supplement?