if you have cured LR
there is no need to cause a cycle because there is already benificial bacteria on the LR
. This is the reason for a cycle to make/grow this bacteria.
I set up my 55 with 50lbs LR
and never had a cycle, had a fish in the tank after a week went by. Did not want to wait to long so the bacteria would not die. They could add the shrimp and see waht happen but if the rick is good cured there should be no signs of ammonia...
Can not hurt to add a small shrimp and wait a week or 2 and see what happens. Just remember you might not see any cycle..