Can a Harlequin Tusk be kept with hermit crabs and smaller fish and how fast does it grow because I will be getting a 180 plus gallon in the next 6months to a year and a half but for now I have a 50 gallon. The stocking is as follows SPS,Xenia,mushrooms,Ricordea,Zoanthids.4 varoius hermits, 1 misc. small crab, scopas tang, gold stripe maroon, long tentacle anemone. I would get smaller fish if i got one.