Specialized Care is Key to Success with Sun Corals

Sun coral (Tubastraea spp.)When ascribed to the various species of the genus Tubastraea, the common name “sun coral” is both fitting and ironic. It’s fitting when you consider that the spectacular polyps of many Tubastraea species can quite justifiably be described as sun-like in both color and shape. On the other hand, it’s ironic in that these species, unlike so many of the corals that grace our aquariums, lack symbiotic zooxanthellae and, therefore, don’t depend on sunlight—or intense reef-grade aquarium lighting—for their sustenance. Having no special lighting needs might seem to suggest that these corals would be a good choice for the novice reefkeeper. However, just the opposite is actually true. Tubastraea are heavy feeders that require a high level of commitment and exceptional husbandry skills and are generally best left to more advanced hobbyists.Physical traits Tubastraea spp. are considered large-polyp stony (LPS) corals, with several species possessing striking yellow to orange polyps that emerge from tubular, and in some cases branching, corallites. There are also darker-polyped species that appear in the aquarium trade from time to time, such as T.

Featured Coral: Fat Head Dendrophyllia

This Featured Coral of the Week comes to us from Joey Nichols at Joe Knows Reefs. Common name: Fat Head Dendro Scientific name: Dendrophyllia fistulata  Dendrophyllia fistulata is a non-photosynthetic coral which does not contain zooxanthellae in it’s tissue thus having to derive all of it’s nutrition from organic matter.  Since they do not require sunlight for growth, these coral are normally found inside and along cave walls and overhangs.   In the aquarium, this coral requires feedings of meaty foods such as brine shrimp and mysis shrimp etc at a frequency of about 2-3x weekly. Origin area: Indo Pacific Care level: moderate due to requirement of frequent feedings. Unlike “sun coral” it can be easily trained to stay open pretty much all day.  These corals

An Ultra-Low-Nutrient System for Acropora and other SPS

Top down shot of Acropora microladosWelcome to the next level of coral care. By now I am assuming you have at least understood all the key general practices to maintain some of the hardier corals, from soft corals to large-polyp stony (LPS) corals to some of the more rugged small-polyp stony (SPS) corals. Each category of livestock can be classified into various requirements for the piece of ocean environment you are trying to simulate. Oftentimes we tend to generalize that all parts of the ocean are the same, but as you become educated about the livestock you are trying to maintain, you will understand that there is no single recipe to make everything thrive and flourish in the same tank.Review time So let us review some of the key attributes we, as responsible hobbyists and nature fans, must familiarize ourselves with in order to provide a sustainable environment. The most common aquarium parameters are the following: 1. Tank dimensions Volume (amount of salt water for stability) Depth (impacts light penetration and available environmental zones) Size (impacts aquascaping, flow, lighting choices, growth) 2. Lighting Type: metal halide, T5, LED, or hybrids Spectrum (10,000 to 20,000 Kelvin) Intensity (lux) Photosynthetically Active Radiation (PAR) Photosynthetically Usable Radiation (PUR) Photoperiod (hours) 3.