What are the water parameters like? Any measurements you can share? Provided they are good you may need to adjust the flow i.e move the coral to another location.
Everyone says be careful of the placing of Euphyllia because they have a powerful sting, so I am a little intrigued by the overlapping polyps of my hammer and frogspawn with no real problems. Anyone got ideas on that? Check that out for a sweeper tentacle
!! While they are not overlapping in the picture the polyps are frequently in direct contact.
Regards