It is possible and preferrable to have a small clutch of cleaner shrimp. I have three in my tank but I understand it is OK to have as many as 5-6. Mine have set up a cleaning station and jump onto all the fish (except the clowns) including the lionfish. I have never intentionally fed either my cleaners or blood shrimps. They tend to gather all they need from forraging and snatching a bit of mysis during daily feedings. Hope this helps.
-Dr Marco :sfish: