Oddball Reef System Symbiosis

Symbiotic relationships are among the most interesting aspects of this hobby. A coral reef is a battlefield for real estate; however, there are still amazing examples of cooperation between completely different animals. Everyone is very familiar with clownfish and anemones, and for good reason! This combination is likely responsible for drawing more people into the … [Read More]

5 Types of Marine Fish that are Reef Safe with Caveats

When we say a marine fish is “reef safe,” we usually mean that it won’t eat the corals or other sessile invertebrates that we keep in reef systems. Using that definition, we can easily determine that, for example, the peaceful, planktivorous purple dartfish (Nemateleotris decora) is completely reef safe but the exquisite butterflyfish (Chaetodon austriacus), … [Read More]

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]