hey if you not sure, dun give wrong info. Most likely these days you wun get to see royal gramma any more or very rarely as there is not much caribbean shipment. Most of them are being replaced by brazil shipment. Thus that show why royal gramma is scarce as it come from caribbean. Think what ah siao saw was brazilian gramma.
Yes, but how big is your tank, BT can grow up top ard 1 feet and IMO need very huge tank. If you have a big tank let say 4-5feet, the BT IMO should be added first then the YT as BT is way nmore docile.
if your damsel is an establishes one, then i think anthias will be attack by them. Therefore if you want to get anthias, suggest you getting the more robust and hardy species like tri- colour, squaspot or squaminpinis
Yup from my rock scape in my pic, you can see that my coral are pretty cram and close to toher another. Thus a 1 or 2 colonies had they bottom turn white as joe say, no receding but just white.