I have fragged a lot of sinularia over the last few years and I found the best way to do this is how Bob describes, place branch cuttings in a tupperware with a small rubble of rocks. This method may take an extra week or so but it's worth it in my opinion because the corals are attaching naturally, also sinularia can mucus quite a bit with the needle and thread method. This is however for sinularia species, colts, leathers, and other softies have different frag methods too, needle and thread works great for the majority of softies as well as the rubble method.
