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CerMedia Marine Pure GEMS 3/4" Bio Filter - 90gram

Item #
Marine Pure
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In Stock

Cermedia is proud to be announcing the new MarinePure GEMs. Made with the same formula as our popular 1.5” SPHERES, the GEMs are approximately ¾ inches in diameter.  They will be packaged in hexagonal shaped boxes containing of 90 grams. 
Each box will contain over 1,450 Square Feet (135 Square Meters) of accessible Surface Area.  MarinePure GEMs are the perfect size for canister filters, hang on the back filters or nano-tank filter systems. This amount of media is good for up to 70 gallon systems.  They will be the perfect solution for ammonia and nitrite elimination and most users will also see better control in Nitrates. 
MarinePure is the perfect place for beneficial bacteria to flourish in order to remove harmful fish wastes. It will eliminate ammonia and nitrites and lower nitrates.
MarinePure's bio-media is the most technically advanced bio-media available today.
Features Thin Bio-Film Technology
MarinePure is inert and will not harm aquarium inhabitants.
Why Use MarinePure?
Better value due to high performance
Reduced tank maintenance
Allows for higher fish loads
Can use a smaller filtration footprint
More consistent water chemistry
Easy to shape
Can be used in a variety of applications;
Used in tank
Used in sumps
Used in canister filters
Used in DIY filters
Used in trickle or shower filters
Used in waterfall filters
Used in hang on back filters
Thin Bio-Film Technology
Combination of vast surface area and open/interconnected pores allow a thin bio-film to develop.
This thin film allows bacteria to flourish because necessary nutrients are immediately available.
With the open pores, old dead bio-film is easily flushed from the media and will not plug the media.
Water flows through the media, not around as with other denser medias, thus utilizing the most surface area for beneficial bacterial growth.
MarinePure Technical Info 
MarinePure is designed to be a substrate for bio-filtration, specifically to target ammonia and nitrite removal (nitrification) and to minimize nitrates (denitrification). MarinePure is suitable for both freshwater and saltwater (marine) environments. MarinePure can be used fully submerged or in trickle/shower filters. It should not be used in moving bed filters.
Light Weight Bulk Density = 0.3 - 0.5 g/cc
High Surface Area 1.3 - 1.7 m2/g
Open Pore Structure 80 - 90% Open Porosity
Chemically Inert
Hydrophilic Adsorbs water and stays wet longer
Low Pressure Drop
Unaffected by ozone
Bio-Media Comparison Surface Area Per Pack(Volume ft2/ft3)
MarinePure 8x8x4 139,800
MarinePure 8x8x1 139,800
MarinePure 1.5" Sphere 132,500
Assorted Ceramic Medias ~20,000
Japanese Shower Media 23,000
Feather Rock 19,000
Plastic Bio-Balls 97
Sintered Glass Media 19,000

Surface Area 
Product Description Surface Area per Piece Surface Area per Pack Volume
  (m2) (ft2) (m2/m3) (m3/l) (ft2/ft3)
8x8x1" Plate 540 5,750 n/a n/a n/a
8x8x4" Block 2,150 23,000 n/a n/a n/a
1.5" Sphere 22 240 435,000 435 132,500

Usage Recommendations 
Recommended MarinePure amount for to eliminate ammonia and nitrite in an active filter, for a typical bio-load.
Tank Size Spheres Plates Blocks***
50 gal. < 1 quart < 1 plate < 1 block
100 gal. 1 quart 1 plate < 1 block
250 gal. 2 quarts 2 plates 1 block
500 gal. 1-2 gallons 3-4 plates 1-2 blocks
2,500 gal. 3-4 gallons 12 plates 4 blocks
*** MarinePure's thick blocks are designed to be used in passive systems to control nitrates. If used in active systems they will eliminate ammonia and nitrites (nitrification).
Recommended MarinePure amount to minimize nitrates in a passive filter, for a typical bio-load.
Tank Size Block in Passive Location
50 gal. 1 block
100 gal. 1 block
250 gal. 2 block
500 gal. 3 blocks
2,500 gal. 15 blocks
* MarinePure's thick blocks are designed to be used in passive systems to control Nitrates (like live rock). If used in active systems they will eliminate ammonia and nitrites (nitrification).

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