So for some reason my Melanurus wrasse has apparently survived a velvet wipe out of my 100 g tank,I lost 9 fish in 6 days but this wrasse is healthy vibrant and eating very well,it's going on 3 weeks since the outbreak and he shows no signs of distress whatsoever,I set up a 30g quarantine/holding tank for all future fish and want to move the wrasse in there so I can start the fallow period on the display,the tank is bare bottom with some pvc piping for hiding places,my question,does a melanurus wrasse need a sand bottom of will the bare bottom be ok,he won't be the only fish in there.