New Fish

[1bigstud]

Quick q, After adding a new fish how long do u go without seeing him till u call it a death??? The reason I ask is yesterday I added a neon goby to my tank. usually when I add new fish to my tank they dont bother to hide and start exploring right away. The goby did the same thing at first but when I came back to the tank a couple hours later it was nowhere to be found today is day 2 and no sign of it. So at what point do I call it a death?