Refugiums
A refugium is a dedicated space for beneficial creatures like copepods to multiply without the threat of being eaten by your aquarium fish. In recent years, refugiums have been used more frequently for cultivating macro algae like chaetomorpha, which absorbs nitrates and phosphates as it grows. If you don't have a sump with a refugium chamber, no worries! There are a multitude of hang on back refugium options available.
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