These filters have a sand that supports great amounts of "good guy" bacteria colonies They work like a canister filter except they use a special sand instead of media. This is a biological filter.

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[ Canister ] [ Corner ] [ Fluidized Bed ] [ Media ] [ Power ] [ Portein Skimmer ] [ Reverse Osmosis ] [ Sponge ] [ Undergravel ] [ Wet/Dry ]

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Last Updated: Wednesday, February 05, 2003 10:04:27 PM -0500