Trace elements are elements that appear in very small quantities in salt water. In analytical chemistry terms, they are elements in a sample that have a concentration of less than 100 parts per million (ppm). Trace elements are vital to all sorts of biological processes that occur in a reef aquarium. Continue reading
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Bubble corals are a stony coral from the Genus Plerogyra. Bubble corals are one of those stony corals that many beginners in the hobby mistake for a soft coral because of their fleshy body that often hides their skeleton. They come in two main varieties that are commonly seen. Ones that have round grape-shaped bubbles, and others that have irregularly shaped bubbles.
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