I’ve had the same experience with saltwater with wrasses and shrimp.Ok. Thanks.
Appreciate your experience with Loaches. I have been watching one of mine cleaning the gill's of a juvenile buttikoferi cichlid.
It reminds me of when I had some marine wrasses and they would do the same.
All my fish look and act healthy, but the Loach only does this with the one fish and the buttikoferi seems to tolerate it.