Lighting: Requires moderate to strong lighting. Usually, brighter is better although some hobbyist appear to have very good success with lower light levels.
Water Current: Xenia require at least moderate water flow. They are one of the few corals that seem content to be right against the strong output of a powerhead. In still waters the pumping usually diminishes and the coral goes into decline.
Temperature: Does well within a range of at least 75º to 83º F. Temperatures around 84º can sometimes appear to cause stress and Xenia appears to be more stable at lower temperatures of 76º - 78º.
Aggressiveness: Low. Xenia does not possess any apparent stinging capability and will not bother other corals, but can tend to grow over and shadow its neighbors. When happy, the coral can reproduce by division at an alarming rate and may require frequent pruning to keep it from crowding out other corals.
Feeding: Xenia is photosynthetic and does not accept any known foods. It is thought that they absorb some of their nutrients directly from the water. In fact, some hobbyist keep large colonies of Xenia as filter beds where the xenia is regularly pruned for nutrient export. It is unclear if this is very effective. Xenia may do better in tanks that are not heavily skimmed.
Supplements: The main supplement normally associated with successfully keeping Xenia is Iodine. Many authors state categorically that iodine supplements are critical to success and lack of iodine supplements will cause xenia to crash. I have keep Xenia with and without iodine supplementation and have observed no difference, so I am more skeptical of the iodine connection. Low Alkalinity levels can cause Xenia pulsing to decrease or cease altogether, so alkalinity levels should be monitored and kept above a minimum of 2.5meq/l.
Tank Positioning: Usually kept high up on the reef for strong water flow and highest possible lighting. Xenia will reproduce in the tank by attaching its stalk against adjacent surfaces it contacts and splitting into two colonies. In this way, Xenia colonies tend to 'walk' in the direction that water movement bends their stocks, so you may want to consider this in your placement. Xenia can usually be coaxed to grow up the back glass of the tank and forms a nice background display.
