Which gorgonian do you have? You talk about it being a "Purple Frilly", but you talk about white polyps, and a Purple frilly has brown/tan polyps on cylinder shaped blades. Do you have a Purple Whip maybe which has flattened blades with white polyps?
Anyway, both gorgonians are very similar in care, and are easy to care for provided you can meet some simple demands. Many people don't understand that most photosynthetic gorgonians need as much light as many SPS corals. What type of lighting do you have? Whereabouts is the Gorgonian placed in relation to the lights?
Gorgonians also like strong water currents. A Koralia 2 isn't overly powerful, but if it is quite close to the Gorgonian and pointed directly at it, the powerhead could be causing undesirable flow. Generally, most corals prefer indirect flow. I would suggest you point the powerhead so that it blasts by the Gorgonian instead of directly at it.
How long has the Gorgonian been in your tank? Gorgonians can shed a waxy skin much like leather corals do, and new Gorgonians will often do so within the first month or so they are in a new tank. Photosynthetic gorgonians also require reef quality water. What are your water parameters at?
I would suggest you adjust the powerhead, check lighting is suitable, check water parameters, leave it alone (don't touch it), and hope for the best.
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~ Mindy
SPS fanatic.
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