Calcium: A Critical Element in Reef Aquariums

The stony corals, crustaceans, mollusks, and echinoderms in our marine aquariums depend on it to build their skeletons/shells/tests. Soft corals use it to build supportive structures, called sclerites, in their tissues. Of course, without it, you’ll never get a nice patina of coralline algae on your rockwork. The “it” I’m referring to is calcium, and … [Read More]

5 Marine Aquarium Misconceptions I No Longer Espouse

Casting my mind back on my early days as a marine aquarium keeper, it’s funny how some of my stances on various aspects of the hobby have, shall we say, evolved in the intervening years. Of course, these changing opinions have led to different ways of doing things—and different ways of dispensing advice. Here are … [Read More]

5 Common Reasons Leather Corals Refuse to Expand

The soft coral species commonly known as leather corals (various and sundry Sarcophyton, Lobophytum, Sinularia, and Alcyonium species among others) are often among the first invertebrates budding reef hobbyists select for their systems—and with good reason. The leather corals, so named for their tough, leather-like texture, tend to be extremely hardy, adaptable, and easy to … [Read More]