Aiptasia

[Gseclipse02]

what are you using for lights? odd ?....

[jtdunham]

The first coral to go each time was the green star polyp, then the mushrooms.
The polyps were in a medium to medium high flow area and the mushrooms were in a low frlow area.

[jtdunham]

Standard Lights for Red Sea 34 gal: From the Users Manual
"two 55 watt T5 power compact flourescent bulbs with a high-polish, textured aluminum reflector.... The lighting provides 1 watt per liter of clear blue sky color (10,000K) with a 1:1 ratio to pure actinic blue (420nm wavelength peak)".

as for skimmer removing nutrients I do use Coral Vite once a week when I have corals. Tried Coral Vite more frequently but no help.

[marshall.read]

the reason i asked about the lights is that if we assume you don't have any chemicals in the tank and we assume the tank has cycled, then something has to account for the death of the coral but not the fish. if the lighting was really poor that could account for the death of the coral but not the fish. however, the lighting seems more than adequate, so at this point i'm going to second Christopher's thoughts on the iodine. it may have seeped into the rocks and is leaching out into the water.

[RICKY81]

you mentioned all this information about your lights but never mentioned how old they are....if they are very old about a year old they probably need to be replaced..........i have also noticed that you haven't mentioned anything about ur Alkalinity levels... as for my personal experience i once had problems with my corals dying and were my mh lights, changed them color was better and did better then my alkalinity was really low and now i have increased the levels to a more normalized level about a 3-4 rather than a 1 but still working on it..

Standard Lights for Red Sea 34 gal: From the Users Manual
"two 55 watt T5 power compact flourescent bulbs with a high-polish, textured aluminum reflector.... The lighting provides 1 watt per liter of clear blue sky color (10,000K) with a 1:1 ratio to pure actinic blue (420nm wavelength peak)".

as for skimmer removing nutrients I do use Coral Vite once a week when I have corals. Tried Coral Vite more frequently but no help.

[Texreefer]

Welcome to MAAST!
H2o tests all fine,,? probably not. its not aptasia killing your stuff. its most likely your water quality,lighting etc.. give us all the details in numbers. we might see something you are missing, and please don't add another goniopora to your tank. they are very difficult to keep alive and will just die on you