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This 150 Micron Polypropylene mesh bag with built-in drawstring is used to hold media in aquariums and ponds. It is industrial grade, machine washable, and re-usable. Can be used with any media including all types of carbon, ammonia, nitrate and phosphate reducers. When changing media, wash bag thoroughly and re-use. 
Crystal Clear Aquatics - 150 Micron Media Bag 7"x32"
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