I had to order it from Australia and was the interceptor soft chews but worked the same as the had pill and took about a week to get in. I would say if the are on your sps then they are other places traveling from sps to sps and the only way to be sure would be to treat the entire tank.
this happened to me i got some interceptor from a exotic pet vet in northern va. its hard to get both i treated the whole tank with two doses. killed all of them i qt my shrimp and crabs but lost my acro crab because i could not catch him