you just have to test the water, each tank is different,
what will happen is the ammonia will go up and drop then the nitrites, then the nitrates, once teh nitrites and amonia are 0 it is done, this can happen very fast or it cna take some time, weeks to even months, normally with lr it takes weeks(1 to 3, if the lr is cured), so jsut test daily until you see them go up and back down
maitain ph and salinity while this is happening, and do nothing to try and reduce the ammonia nitrites or nitrates, until it is over