Many novice (and experienced) saltwater aquarists are a bit leery about starting a Reef Tank with saltwater corals. Their requirements not being very well understood, saltwater corals used to be almost impossible to keep for any length of time in an aquarium. Over time and with many successful and failed experiments along the way, the knowledge, products and information are now in place, so that many corals can now be successfully kept in small aquariums. Some corals are now considered "easy" (how far we have come) while many others are still deemed difficult to impossible for the average Reef Tank hobbyist.
Mushroom (Actinodiscus) Corals
Safe with fish, crustaceans and motile invertebrates, but should not be placed next to other soft and stony corals and sessile invertebrates, because of the detrimental effect they can have on them.
Mushroom and Leather (Cladiella) Corals
Star Polyps, Green Star Polyps and Daisy Polyps (Pachyclavularia)
These are very good starter corals.
Sea Mat and Button Polyps (Palythoa)
These species are good starter corals.
Finger Leather and Colt (Cladiella) Corals
Sea Mat and Button Polyp (Protopalythoa) Corals
These are considered to be good starter corals.
Toadstool, Leather and Mushroom (Sarcophyton) Corals
These are great beginner's corals which adapt well to most lighting schemes and low to moderate current levels. These corals grow rapidly and are considered excellent for propagation.
Zoanthid, Sea Mat and Button Polyps (Zoanthus)
These aggressive corals have a high reproductive rate and can spread rapidly in an aquarium. Some species in this genus contain a strong neurotoxin which can affect humans.
Lobed, Flat, and Open Brain (Lobophyllia) Corals
These corals do best with bright direct light and calm currents however if minimally adequate light and water movement is provided, it will grow well in a tank.
This coral normally feeds actively at night, however the tentacles occasionally extend during the day and readily take food offerings feeding almost exclusively on zooplankton and bacterioplankton which consists of free-living bacteria, detritus, particulate (POM) and suspended organic matter (SOM).
Lobophyllia are not normally aggressive however there have been reports of sweeper tentacles being formed when they come in contact with other corals.
Closed and Dented Brain (Symphyllia) Corals
These corals are highly successful in captivity, being very tolerant of different light and current conditions, but prefering bright, indirect light and moderate to low currents. These corals are sensitive to the presence of some soft corals, i.e. Xenia and Litophyton and are very reactive to food (Zooplankton, Phytoplankton and algae) in the water.
Considered an easier coral to keep.



