Seriously? My lfs made it seem like a tang would outgrow our 65 tank within a year at a massive growth rateIf I get a dusky that is 2.5", will it get to 6+ inches in my 180? how fast do they grow? Or will he be limited? I've had my blue tang for years and he stays around 4"...same with my regal angel, stays at 3.5".