Help!!! Zoanthids and Starburst Polyps die within days

[shempdevil]

A few months ago I bought a 6 lb piece of live rock with a large colony of green star polyps living on it.
I bought them from a VERY reputable aquarist, Dr. Mac who owns Pacific East Aquaculture Coral Farm. The polyps were abundantly happy when I purchased them.

I introduced them to my tank, and they never opened.
When I say never opened, I mean that no more than about 5 or 6 polyps have ever opened at any one time.

A few weeks later, I purchased a medium zoanthid colony. SAME THING...NEVER OPENED.

I have them positioned near the top of the tank, about 8" from my lighting fixture.
I have tried different levels of water movement by adjusting my jets for a few days, but no luck.

I know that Star Polyps and Zoanthids are very simple corals and it baffles me that they won't open even though all of my other corals are happy.

Any ideas what might be the problem?
I heard that the large leathers and mushrooms I have may be poisoning them.
I have attached a photo of a Sarcophyton that is probably about 8" in diameter.


TANK DETAILS
46 Gallon Euro Bowfront Tank
36" Nova Extreme Pro 6x39w T5 (2 hrs dawn, 11 hrs daylight, 2 hrs dusk)
45 pounds of Florida Crushed Coral Substrate
45 pounds of Fiji Live Rock
(1) Maxi Jet 1200
(2) Maxi Jet 600
Shatterproof Heater
Emperor 400 Biowheel Filter
Tank Established for 38 months with one fish casualty (Neon Puffer) and 2 Coral Casualties (Starburst Polyp colony and Zoanthid Colony.

CORALS
(1) Zooanthid Colony DEAD
(1) Green Star Polyp Colony DEAD
(2) Brown Leather Colonies VERY HEALTHY
(1) Trachyphillia Geofroyi VERY HEALTHY
(1) Purple Leather Colony VERY HEALTHY
(1) Mushroom Colony VERY HEALTHY


Fish
(1) Blue Devil Damsel - Chrysiptera cyanea
(1) Banggai Cardinal - Pterapogon kauderni
(1) Lawnmower Blenny - Salarias fasciatus
(1) Saddled Valentini Puffer - Canthigaster valentini
(2) Blue Velvet Damsel - Neoglyphidodon oxyodon
(1) Brown Scopus Tang - Zebrasoma scopas



INVERTEBRATES
(3) Astrea Snails
(3) Turbo Snails
(3) Scarlet Hermit Crabs
(2) Bumble Bee Snails

[MUCHO REEF]

Sorry to hear the bad news, can you share your parameters, age of the system, all additives, recent changes made internally?

[seapug]

star polyps can sometimes take a couple weeks to open when put in a new tank. If the mat or polyps aren't dissolving they are fine and will open eventually. Same thing with the Zoas. Try moving both to a lower zone in the tank and leave them there for a couple weeks and resist the urge to futz with them.

[BumpyJohnson]

I agree with seapug leave them be lower in the tank.

[DEEC77]

I also notice you have a Saddled Valentini Puffer - Canthigaster valentini. It could be picking on them. So move them lower and keep and eye on the puffer.

~Dee~