This video shows one of the many beautiful contrasts of color that this genus possesses. All Dendronephthya species are aposymbiotic, being voracious feeders, absorbing many nutrients in the water, as well as feeding on phytoplankton and/or zooplankton with their polyps, depending on the species. They will also use sweeper tentacles to capture food in the wild. Carnation Corals are difficult to keep, with only advanced aquarists being qualified to own them. Going from the dealer to tank, they often deflate, never to return, then start to decay. They need a constant current and a constant drip of zooplankton and/or phytoplankton to keep them healthy, which in turn can pollute the aquarium.
The Carnation Coral is very difficult to care for and should be left to the experts. Although they are extremely attractive, Carnation Corals have a poor history of survival. Oddly, they have been known to change color! Unlike other corals, they do not use light and they depend on copious amounts of zooplankton and phytoplankton to keep alive. This can quickly pollute a captive system. One suggestion is to hang them upside down, as this is a natural position for them. Strong water movement, perfect water quality and a constant drip of phytoplankton is helpful.
The Alcyonium genus is very easy to care for and can be recommended for beginners. Just make sure you get the species you want. Cold water species must be provided with a cool water environment, which will mean having a chiller for the reef aquarium system. Don't mistakenly get a cold water species for a normal tropical reef tank, or it will die in that environment in about 2 weeks. Provide a tank that is at least 50 gallons and they can be fed Marine Snow and similar products.
The Kenya Tree Coral can be easy to moderate to care for. They come from a more nutrient rich environment and they are more dependent on outside food for survival. They depend on foods in the water column like phytoplankton more so than light. This coral does not need to be under Metal Halides, but they still need good turbulent water flow. Do not expose to fresh water when topping of your tank. This stresses the coral and may lead to its eventual demise.