Japanese Basslet should be
L. collettei. I'm not sure how they get on with Grammas, but I'm going to suggest probably not well. I say try it, and if it doesn't work, find a new home for the Royal Gramma since the Liopropoma is a nice fish!
All kidding aside, I have been getting good results allowing new fish to acclimate to water parameters and get them eating while keeping them in my sump. Once they are relaxed there I will introduce into display tank.
If it is
L. swalesi or Swale's Basslet, even better!
