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 12 LBS Premium Activated Carbon For Pond Reef Aquarium with Free Nylon Media Bag $32.99 Time Remaining: 27d 3h 14m Buy It Now for only: $32.99 |
 WHOA AQUARIUM POND FISH TANK FILTER MEDIA ACTIVATED CARBON $9.99 Time Remaining: 8h 40m Buy It Now for only: $10.99 |
 5 LBS Activated Carbon Aquarium Pond Canister Filter Phosphate Free Mesh Bags $19.95 Time Remaining: 10d 9h 28m Buy It Now for only: $19.95 |
 10 lb Pound Highest Quality Liquid Phase Activated Carbon for Pond Aquarium $43.99 Time Remaining: 12d 14h 36m Buy It Now for only: $43.99 |
 YEAH AQUARIUM POND FISH TANK ACTIVATED CARBON 1 YEAR SUPPLY $39.99 Time Remaining: 11h |
 20 LBS Premium Activated Carbon For Pond Reef Aquarium $45.99 Time Remaining: 19d 12h 48m Buy It Now for only: $45.99 |
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 SALE 4X REEF AQUARIUM ACTIVATED CARBON CHARCOAL FILTER MEDIA $25.99 Time Remaining: 12h 12m |
 49 LBS Activated Carbon Aquarium Pond Canister Filter Phosphate Free Mesh Bags $18.99 Time Remaining: 21d 13h 27m Buy It Now for only: $18.99 |
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 12 LBS Activated Carbon Aquarium Pond Canister Filter Phosphate Free Pounds $35.00 Time Remaining: 10d 9h 10m Buy It Now for only: $35.00 |
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 YEAH 4X REEF AQUARIUM ACTIVATED CARBON CHARCOAL FILTER MEDIA $25.99 Time Remaining: 15h 35m |
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 300g Premium Activated Carbon Filter Media Aquarium External Filters $4.59 Time Remaining: 8d 22h 13m Buy It Now for only: $4.59 |
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 2 AquaClear 150 StepTwo Ultragrade Activated Carbon Filter Insert A 602 15 oz $4.99 Time Remaining: 1d 1h 56m |
 50 lb Pound Highest Quality Liquid Phase Activated Carbon for Pond Aquarium $139.99 Time Remaining: 12d 15h 42m Buy It Now for only: $139.99 |
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 20 LBS Activated Carbon Aquarium Pond Canister Filter Phosphate Free Bags $49.00 Time Remaining: 10d 9h 16m Buy It Now for only: $49.00 |
 WOO 4X REEF AQUARIUM ACTIVATED CARBON CHARCOAL FILTER MEDIA $25.99 Time Remaining: 1d 9h 26m |
 22 Pounds or 1000 Grams of Aquarium Activated Carbon And 1 Filter Zip Net Bag $13.99 Time Remaining: 7d 4h 13m Buy It Now for only: $13.99 |
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 Aqua Clear 70 300 Activated Carbon 42 oz x 6pk $26.99 Time Remaining: 19d 14h 6m Buy It Now for only: $26.99 |
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 DEAL AQUARIUM POND FISH TANK FILTER MEDIA ACTIVATED CARBON $9.99 Time Remaining: 1d 10h 59m |
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 WHOA 4X REEF AQUARIUM ACTIVATED CARBON CHARCOAL FILTER MEDIA $25.99 Time Remaining: 1d 11h 33m Buy It Now for only: $28.99 |
 Activated Carbon Aquarium Pond PHOSPHATE FREE 5 pounds 4mm Pellets $13.95 Time Remaining: 1d 2h Buy It Now for only: $13.95 |
 30 pound box of ACTIVATED CARBON Granular Aquarium Fish filter pond coal $74.99 Time Remaining: 25d 12h 41m Buy It Now for only: $74.99 |
 22 Pounds or 1000 Grams of Aquarium Activated Carbon And 1 Filter Zip Net Bag $7.99 Time Remaining: 1d 12h 51m Buy It Now for only: $8.95 |
 29 Pounds 1300 Grams of Aquarium Activated Carbon Sealed In 3 Media Bags $13.99 Time Remaining: 7d 13h 47m Buy It Now for only: $13.99 |
 Aqua Clear 20 Mini Activated Carbon 3pk Filter Media $4.63 Time Remaining: 13d 12h 47m Buy It Now for only: $4.63 |
 50 LBS Activated Carbon Media Aquarium Canister Pond Filter Phosphate Free Bags $89.95 Time Remaining: 10d 9h 22m Buy It Now for only: $89.95 |
 WHOA AQUARIUM POND FISH TANK ACTIVATED CARBON 1 YEAR SUPPLY $39.99 Time Remaining: 1d 14h 24m Buy It Now for only: $43.99 |
 Acurel LLC Premium Activated Filter Carbon Aquarium and Pond Filter Accessory 9 $40.72 Time Remaining: 13d 23h 26m Buy It Now for only: $40.72 |
 Activated Carbon Charcoal 8 ounce Air Water Odor $4.00 Time Remaining: 25d 9h 54m Buy It Now for only: $4.00 |
 DEAL 4X REEF AQUARIUM ACTIVATED CARBON CHARCOAL FILTER MEDIA $25.99 Time Remaining: 1d 17h 43m |
 1 lb Activated Carbon LARGE pellets coarse Aquarium Pond Water Filters $13.99 Time Remaining: 13d 1h 28m Buy It Now for only: $13.99 |
 10 oz Acurel Premium Activated Filter Carbon Granules aquarium filter media $9.96 Time Remaining: 20d 16h 59m Buy It Now for only: $9.96 |
 WHOA AQUARIUM POND FISH TANK FILTER MEDIA ACTIVATED CARBON $9.99 Time Remaining: 1d 18h 20m Buy It Now for only: $10.99 |
 Aquarium Super Activated Carbon Filter Sponge 4FishTank $3.42 Time Remaining: 24d 21h 17m Buy It Now for only: $3.42 |
 20 LBS Premier Activated Carbon For Aquarium Pond Reef $53.00 Time Remaining: 2d 9h 5m Buy It Now for only: $53.00 |
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 22 Pounds or 1000 Grams of Aquarium Activated Carbon And 1 Filter Zip Net Bag $8.25 Time Remaining: 2d 14h 8m Buy It Now for only: $9.25 |
 1 lb Pound Highest Quality Liquid Phase Activated Carbon for Pond Aquarium $13.98 Time Remaining: 10d 23h 18m Buy It Now for only: $13.98 |
 Aqua Clear 70 300 Activated Carbon 3pk Filter Media $10.42 Time Remaining: 13d 12h 46m Buy It Now for only: $10.42 |
 YO AQUARIUM POND FISH TANK FILTER MEDIA ACTIVATED CARBON $9.99 Time Remaining: 2d 17h 15m |
 4x 1L Odyssea Diamond Activated Carbon Filter Media $19.99 Time Remaining: 5d 15h 34m Buy It Now for only: $19.99 |
 Aquarium canister filter media Pad Activated Carbon $8.99 Time Remaining: 18d 3h 18m Buy It Now for only: $8.99 |
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 YO 4X REEF AQUARIUM ACTIVATED CARBON CHARCOAL FILTER MEDIA $25.99 Time Remaining: 2d 17h 18m |
 20 LBS Ultra Premium Grade Activated Carbon For Pond Reef Aquarium $54.99 Time Remaining: 20d 6h Buy It Now for only: $54.99 |
 40 oz Acurel Premium Activated Filter Carbon Granules aquarium filter media $19.96 Time Remaining: 20d 17h Buy It Now for only: $19.96 |
 YO AQUARIUM POND FISH TANK ACTIVATED CARBON 1 YEAR SUPPLY $39.99 Time Remaining: 2d 18h 49m |
 NEW Bulk Aqua Tech ACTIVATED Carbon For Aquarium Pump Filters and Filtration $11.49 Time Remaining: 15d 16h 17m Buy It Now for only: $11.49 |
 4 Activated Carbon Cut to Fit Aquarium Filter Pad Bulk 10 x 18 Pads $18.85 Time Remaining: 25d 7h 16m Buy It Now for only: $18.85 |
 2 AquaClear 150 StepTwo Ultragrade Activated Carbon Filter Insert A 602 15 oz $4.99 Time Remaining: 3d 1h 56m |
 1000g Aquarium Activated Carbon w Filter Media Bag $12.99 Time Remaining: 18d 16h 37m Buy It Now for only: $12.99 |
 Bio Ball Ceramic Ring Activated Carbon Aquarium filter Media Package $10.63 Time Remaining: 12d 18h 48m Buy It Now for only: $10.63 |
 5 lb Pound Highest Quality Liquid Phase Activated Carbon for Pond Aquarium $30.95 Time Remaining: 11d 15h 13m Buy It Now for only: $30.95 |
 22 Pounds or 1000 Grams of Aquarium Activated Carbon And 1 Filter Zip Net Bag $7.99 Time Remaining: 3d 2h 43m Buy It Now for only: $8.95 |
 30 pound box of ACTIVATED CARBON Granular Aquarium Fish filter pond coal $74.99 Time Remaining: 25d 12h 45m Buy It Now for only: $74.99 |
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 Lab Grade Activated Carbon Top Quality $1.99 Time Remaining: 3d 7h 2m Buy It Now for only: $2.89 |
 50 lb Activated Carbon LARGE pellets coarse Aquarium Pond Water Filters $139.99 Time Remaining: 13d 12h 1m Buy It Now for only: $139.99 |
 Carbon Lignite Premium Grade Activated Reef Aquarium 4 lbs Crystal Clear Water $17.49 Time Remaining: 14d 23h 54m Buy It Now for only: $17.49 |
 BEST AQUARIUM POND FISH TANK FILTER MEDIA ACTIVATED CARBON $9.99 Time Remaining: 3d 10h 28m |
 Activated Carbon Aquarium Pond PHOSPHATE FREE 3 pounds $9.95 Time Remaining: 10d 11h 36m Buy It Now for only: $9.95 |
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Activated Carbon
Granular Activated Carbon
Granular activated carbon (GAC) Granular activated carbon has a relatively larger particle size compared to powdered activated carbon and consequently, presents a smaller external surface. Diffusion of the adsorbate is thus an important factor.
These carbons are therefore preferred for all adsorption of gases and vapours as their rate of diffusion are faster. Granulated carbons are used for water treatment, deodourisation and separation of components of flow system. GAC can be either in the granular form or extruded. GAC is designated by sizes such as 8×20, 20×40, or 8×30 for liquid phase applications and 4×6, 4×8 or 4×10 for vapour phase applications. A 20×40 carbon is made of particles that will pass through a U.S. Standard Mesh Size No. 20 sieve (0.84 mm) (generally specified as 85% passing) but be retained on a U.S. Standard Mesh Size No. 40 sieve (0.42 mm) (generally specified as 95% retained). AWWA (1992) B604 uses the 50-mesh sieve (0.297 mm) as the minimum GAC size.
The most popular aqueous phase carbons are the 12×40 and 8×30 sizes because they have a good balance of size, surface area, and head loss characteristics. "Granular activated carbon (GAC)", also called activated charcoal or activated coal is a form of carbon that has been processed to make it extremely porous and thus to have a very large surface area available for adsorption or chemical reactions.[1] The word activated in the name is sometimes replaced with active. Due to its high degree of microporosity, just 1 gram of activated carbon has a surface area in excess of 500 m2 (about one tenth the size of a football field), as determined typically by nitrogen gas adsorption. Sufficient activation for useful applications may come solely from the high surface area, though further chemical treatment often enhances the absorbing properties of the material.
Activated carbon is usually derived from charcoal. History of carbon filters Carbon filters have been used for several hundred years and are considered one of the oldest means of water purification. Historians have shown evidence that carbon filtration may have been used in ancient Egyptian cultures for both air and water sanitization.[citation needed] 2000 B.C. Sanskrit text refers to filtering water through charcoal (1905 translation of "Sushruta Samhita" by Francis Evelyn Place).[citation needed] The first modern use of a carbon filter to purify potable water occurred in 1862.[citation needed] Carbon filtration was further advanced in the mid 1970's by H. Allen Rice and Alvin E. Rice when they first manufactured a porous carbon block for drinking water use.[citation needed] Currently, carbon filters are used in individual homes as point-of-use water filters and, occasionally, in municipal water treatment facilities.
They are also used as pre-treatment devices for reverse osmosis systems and as specialized filters designed to remove chlorine-resistant cysts, such as giardia and cryptosporidium. Granular activated carbon (GAC) Activated carbon (AC) is a natural material derived from bituminous coal, lignite, wood, coconut shell etc., activated by steam and other means, and each one have different adsorption properties (e.g. bituminous carbon for high chlorine reduction capacity).
We also use various blends of carbon to achieve specific water quality and contaminants reduction (e.g. coconut shell carbon for "sweet taste"). Rapid Gravity Sand Filters The rapid gravity sand filter is a type of filter commonly used in municipal water treatment facilities. Rapid sand filters use relatively coarse sand and other granular media to remove particles and impurities that have been trapped in a floc through the use of flocculation chemicals - typically salts of aluminium or iron.
Water and flocs flows through the filter medium under gravity pressure and the flocculated material are trapped in the sand matrix. Rapid filters are usually built open with the water passing down the filter but by gravity. It has a filter rate of 4 – 8 m3/m2/hr. The tank is made of concrete with a depth of 3.0 to 3.5m. Coarse sand of size 0.4 to 1.5mm is used as the filter medium. Screen Filter A screen filter is a type of filter utilizing a rigid or flexible screen to separate sand and other fine particles out of water for irrigation or other applications. Typical screen materials include stainless steel (Mesh), polypropylene, and nylon.
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Do you need to replace the activated carbon in yr canister filter ?
The activated carbon absorbs many chemical substance in the water. So I wonder if I have to replace it, and how long should I?
Or can I clean it, then reuse ?
Thanks for yr time 
Nah, just throw the stuff out and replace it with a foam/sponge media instead, which will improve both mechanical and biological filtraiton (putting this stuff before the biological media will help keep it unclogged and clean.
Most people don't need carbon because their water treatment plants combined with conditioner makes the water perfectly safe - in fact, if I needed carbon to remove harmful elements I would not even use that water in the first place. Carbon also can't differentiate the good elements from the bad, and can absorb trace elements that are good for long term fish health, such as iodine.
I haven't used the stuff in many years, and the hard core aquarists I've met over the years tend not to as well.
If you do feel you are more comfortable using it, you pretty much have to change it every couple of weeks or every water change to keep it activated.
Activated Carbon Filter
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