They are not red bugs. red bugs would be all over, not just at the base. how old is this tank?
Take a Picture of the coral and post it.
Do not buy a pipefish. You most likely don't have enough food to sustain it.
Ok..I didn't see the rest of the comments. Those are isopods and they are not the destructive type of isopods. If you have these , your tank is very young. I'm guessing your sps
is also a new addition and it's dying on it's own. the critters are just cleaning up, capitalizing on a free meal, sensing that the coral is dying.