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- Jan 27, 2020
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I’m a little familiar with bio media, but not too familiar. What are they exactly designed for and when is it a good time to add if even necessary? I have a 90 gallon currently equipped with a sump, and protein skimmer, live rock, fish and inverts. I plan on adding some soft corals soon and gradually work up to hard corals. Just looking for a little education on this... thanks!