Hey everyone I'm just curious on what everyone's opinions are, I have a 4 ft by 18 inch wide tank, not sure on the gallons as it was given to me, anyways it has been up and running since July, well Thursday I decided to add my final fish in a whitetail bristle tooth tang. Everything seemed fine as I saw him 8 hrs after adding, still hiding in the rock but moving around a little. But since that evening I have not seen him at all, I did a wc today but still didn't see him in that process. It has been 3 days since I have seen him, chances are he's gone?? Thanks in advance