I have a tank with built in over flow and I put some chaeto and live rock in 1st chamber where the bio balls were. I put the chaeto ontop of egg crate to keep it up top. So I look in at it at night and I see my bi colored blenny laying on top of chaeto. I thought it was dead so I go to grab him and bam he was gone. I guess he is living in my over flow fuge. Strange, but now I have to get him lol...another quest.