It has completely baffled me but it seems my new Bristlenose, Whickers, is missing! I only got him yesterday but today is water change day and I always take all my decor out so I can swish the sand and vacuum the sand. It struck me as I was removing the decor that he was no where to be seen so I gently took out the cave and had a look but I can't see him! I frantically opened the filter up but nope he's not stuck in there (I dunno hw I thought a 2 inch fish could fit through a gap just a few millimetres but stranger things have happened! I'm really worried, I mean he has to be in there somewhere! I am BAFFLED! Is there anything I can do to lure him frm his hiding place. There isn't many places he can be but if he's alive I want reassurance and if he's dead I'll need to find him so not to cause damage to the water quality.