Why are my zoanthids wilting?

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Flow is moderate, they are 6" laterally displaced from the output of a Tunze stream.

Other corals and things in the tank include: a few different kinds of zoanthids, bubble coral, colt coral, trumpet coral, blue mushrooms, green hairy mushrooms, montipora digitata frags, clove polyps, and unknown yellow polyps. But nothing is too close to the zoanthids except the montipora, and it was introduced after the melting of the zoanthids started.