Thank you for the link it was very informative. Yes, I did read up on him after my bf brought him home. I feed him by taking a pinch of blood worms and making sure it is saturated w/ water, then I put my hand in front of his face and let them fly. This seems to work b/c then he starts filtering away. I am afraid if I dont do it this way the other fish will get all the food. He is only about 5 inches long now, and I also have 2 irridescent sharks that I aquired with the tank that will also need a larger tank eventually, so either I will be purchasing a bigger tank in the future or I will be trading some fish at the LFS. My LFS said slightly brackish(1 tsp per 5 gal) will be acceptable for the goby but without that he would only live up to 6 mos. I do appreciate your advice. Thanks.