If you need to handle them, do so very briefly and with gloved fingers. can be easy to care for, depending on proper handling procedures. Xenia are different from Anthelia since Xenia polyps rise from a capitulum (top of the stalk) forming small colonies that are only a few inches tall (up to 4″). Anthelia corals form an encrusting mat and their cylindrical polyps grow directly from that base. Some of those common to aquarists include the Pom Pom Zenias of the Heteroxenia genus and the Waving Hand Coral or Glove Coral Anthelia sp. From this family, at least five other genera will pulse. The Xeniidae family itself is considered unique in the coral world because of this ability. The Xenia corals are not the only pulsing corals. If your Pulse Coral is pulsing, then keep doing what your doing! Supplements of iodine are also suggested by some, but with caution as Lugol’s has been found to be detrimental to some Xenia colonies. Some aquarists have found this to induce the polyps to pulse, as if the coral is trying to try pull more nutrients from the water. Adding small amounts of carbon will take some organics out of the water. They are sensitive to falling or low pH and will stop pulsing when the pH is below 8.3. Water chemistry also plays a role in their pulsing, along with lighting and current, just what combination is hard to tell. One thought is that they are pulsating to help with respiration and gas exchange. Many experts and aquarists attribute a variety of reasons for the pulsing phenomena. There is no proven reason why Xenia corals pulse. Not all Xenia pulsate, but the species that do will generally pulse about 8 times per minute, yet there can be quite a variation in the strength and speed of the pulsing action. The polyps can contract considerably but do not retract inside the coral. The color is uniform with just a little contrast between the stalks and polyps. They can be cream, white brown, ivory and light green. Most species from the Xenia genus have unbranched stalks that are short, thick and smooth, from which the polyps arise. Getting them to grow up the back wall of the aquarium makes for an interesting display. Since they tend to grow in the direction of the water flow that they are near, you can get them to grow where you want in the reef tank. With their pulsing heads and the gentle waving of their polyps in the water, they produce an almost mesmerizing affect to the viewer. are some of the most endearing corals, and are highly favored by reef enthusiasts. The Pulse Coral, with its pumping action and bouquet shape, is one of the most beautiful flower corals!
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