I have been hand feeding my dragon goby fish (Gobioides broussonnetii) since I bought him and he is doing really really well, I feed him a mixture of frozen and freeze dried worms and he is a beautiful violet and gray color. Is there anything (food wise) I can put in the tank for while I am gone? I don't want to stress him out and take him with me, in fact I wouldn't be able too anyways. Should I maybe have someone come over and feed him or will he be okay for three days if I feed him right before I leave? I know he's a filter feeder and I have gravel at the bottom of his tank so it is kind of hard for him to sift food out (couldn't find mud or any good sand).