Man, 160 gal tank is rightous as far as being big. If it is cured lr, it should NOT smell (if you smell it and it smells like the bay at low tide-it is not fully cured). You are always going to get some die off during transit, but should not be that bad. IMO, if it does NOT smell, I would just add it. You are going to get a spike, but if it really is CURED lr, then the spike will only be short. If you don't have corals, and it is a 160 gal tank that is well established you should be fine.