Im putting my 2 silvertip sharks in a 60 gallon marine tank, any suggestions for marine tankmates that are big enough not to get eaten? lol Im thinking maybe a hippotas tang but I always get conflicting opinions on the space they need. some say 55 gallons some say 180 o_o so which is it? but yeah, I prefer something solitary, mid size and not freakishly aggressive if anyone has suggestions....