I have a P. ciliata too and she's just great. She's VERY green and used to have a white stripe down her back, but that's gone now. Mine is in a 10g too and seems to be happy; 3+ inch aragonite sandbed, lots of rubble and some halimeda and she currently lives with a blue damselfish. They haven't gotten into any skirmishes so far (it's been over a year). Varied diet is definitely important for stomatopods.