From my understanding It is just fine to propagate in your main tank.. What i would do is remove a bowl of water from the tank and propagate outside in a bowl and place the cuttings in a small container inside the tank with some rubble LR.. That way they can attach by themselves.. I would also run some carbon during the healing process just to make 100% sure..Is it OK to propagate ricordias and shrooms in your main display tank or should this be done in a separate tank?