i would give it a few days and monitor it for any fort of ammonia spike befre you add them.
i'm transfering all my live stock from a 26g to a 35 g, i put some dry aragonite sand in and have a dit of an ammonia spike .5ppm. i'm going to add a few pieces of rock in it to cut that out before i transfer everything over i would suggest the same just make sure there is no spike and the rock is doing its job