My shrimp cleans the fish like a madman until about 3 days prior to molt.. then he just shuts down for about a week. I would just wait a few days and see if they molt then it will take about another 2 fo
him to get down to doing his business. I also find not feeding the shrimp (I give um a small piece of krill every few days) can often stir up thier appite for eating parasites as well. Also when not feeding them you kinda have to not feed the fish or just put small amounts of flake on the top of the water so the fish can get it and there is nothing for the shrimp. As for your Blood red.. yeah mine is worthless as well. The tang probably wants cleaned and the shrimp really has no incentive to clean him right now.