Inexpensive and versatile media bags made of 100% polyester great for freshwater or saltwater aquarium use.

Coarse Mesh Self-Fastening media bag holds various types of filter media including activated carbon and other coarse chemical and biological media. Self-fastening closure makes filling and refilling easy.

Fine Mesh Drawstring media bag with top drawstring makes opening and closing the bag a cinch. Fine mesh bag holds your favorite filter media for simple custom chemical filtration for power filters, canister filters, or wet/dry filters.

Perfect for Chemical Filtration:
Chemical filtration media encompasses a variety of materials that can remove one specific impurity, a variety, and everything in between. The chemical method of filtration removes dissolved particulates from the aquarium via activated carbons and resins. Chemical filtration media cause the dissolved matter to adhere to them. The two most popular forms of chemical media are activated carbon and resins.

Types of Chemical Media for use in Fine Mesh Media Bags:
Activated Carbon
Carbon is filled with microscopic pores that allow certain organic or inorganic materials to stick to them. New carbon works more efficiently than older carbon. When all of the pores are filled, the carbon is no longer effective and the filter begins to act as a biological filter.

Carbon removes many harmful elements from your aquarium, such as: copper, chlorine, dissolved proteins, and carbohydrates. It also removes sulfa drugs and antibiotics, so it should be removed when the aquarium is being treated, then replaced when treatment is completed to remove any leftover medications. Activated carbon can also make your aquarium clear by removing discolorants.

Ion Exchange Resins
Resins are less utilized than carbon, but are becoming more common. These work by attracting a specific molecule to adhere to them. Some attract ammonia or nitrate, and some remove dissolved organics. Ion exchange resins are also utilized in some carbon mixtures like Chemi-Pure and Bio Chem Zorb. The resins often strengthen the filtering ability of the carbon, as well as help biological activity by removing pollutants before they enter the nitrogen cycle. Used properly, chemical filtration can be one of the most useful tools of the aquarist.