Ceramic Biomedia 2" Cubes

Grouped product items
Ceramic Biomedia Cubes - 1/2 Cubic Foot

SKU: 204113

In stock


- +
Ceramic Biomedia Cubes - 2 Cubic Foot

SKU: 204115

In stock

Discontinued by BRS Fresh

- +

Why does BRS recommend this?

Biological filtration is the number one key to a nice and stable reef tank, and anytime we can sneak in some MarinePure Biomedia into an All in one tank, sump, or even overflows we will.  We have run density tests and they have proved to be more porous than any live rock we could find.  They are a great base for sponge growth, microfauna, and even coral frags.

MarinePure is an inert ceramic material with open flow architecture, extremely high surface area and natural wetting properties. A Single 2” Marine Pure ceramic cube has 720 square feet of surface area. This means you can fit almost 60 times the surface area in the same space verses bioballs.


The media’s composition is similar to natural rock formations. MarinePure provides approximately 150,000 sq. Ft per cu. Ft (510 m2/L) of accessible surface area. The properties of MarinePure create a stable home for a dense population of beneficial bacteria that remove ammonia and nitrites from your aquarium. Some systems will also see a decrease in nitrates. MarinePure will work in sumps, trickle filters, wet/dry filters, hang on the back filters or directly in the tank.


  • 100% Tank Tested
  • Most technically advanced bio-filtration substrate
  • High usable surface area for beneficial bacteria growth
  • Open porosity means maximum bacteria exposure to contaminates and promotes excellent water circulation and less clogging
  • Designed specifically to target ammonia and nitrite removal and minimizes nitrates
  • Inert and chemically stable
  • Greater than 80% open porosity
  • Provides consistent water chemistry
  • Reduces tank maintenance
  • Able to support large fish loads
  • Can be cleaned, reused and sterilized


Compare MarinePure Products

Surface area
1½” Marinepure Sphere:  240 sq ft
2" Marinepure Cube: 720 sq ft
8"x8"x1” Marinepure Block: 5,750 sq ft
8"x8"x4”Marinepure Block: 23,000 sq ft


Blocks, Plates, & Spheres

MarinePure is available as 8”x8”x1” Plates, 8”x8"x4” Blocks, or 1.5" spheres.
• Add to existing tank set ups for additional filtration, simply set the block down in your sump
• Place under gravel bed for new tank set up
• Wet-dry filters
• Blocks are ideally suited for large setups


Due to the fragile nature of the MarinePure Cubes we are unable to guarantee that every peice will be an exact cube in shape. During shipping and Handling the cubes can be misshaped or damaged which will not affect the overall performance of the MarinePure Cubes. We highly suggest rinsing the cubes before use.


MarinePure Instructions


 Owners Manual

Write Your Own Review
You're reviewing:Ceramic Biomedia 2" Cubes
Your Rating
Only registered users can write reviews. Please or

Product Questions

I have the cubes in my sump. Do u have to clean them over time? Or does it act like live rock?
Question by: Richard Gallois on Dec 13, 2018, 7:29 PM
Hi Richard,

Over time there will be an accumulation of detritus within the structure of the cubes so periodically swishing them in a container of tank water would be a good idea. You should also avoid placing them in an area that would encourage algae growth that would quickly close up the pore structure of the media.

Answer by: Nick on Dec 14, 2018, 3:22 PM
Can you list the actual count of cubes per box for each of the sizes you are selling ?

MarinePure Ceramic Biomedia Cubes - 1?2 Cubic Foot = _________

MarinePure Ceramic Biomedia Cubes - 1 Cubic Foot = _________

MarinePure Ceramic Biomedia Cubes - 2 Cubic Foot = _________

And add any additional detail about size and count that could be helpful
Ex. Brings 6 cubes @ 1"× 1"

I looked around and their is some conflicting info on some sites.

Question by: CzR on Jun 16, 2016, 6:42 AM
Hey there!
There is not an exact amount of cubes per box as the weight and size of each cube will vary slightly. On average there are
MarinePure Ceramic Biomedia Cubes - 1?2 Cubic Foot =25-30

MarinePure Ceramic Biomedia Cubes - 1 Cubic Foot = 75-80

MarinePure Ceramic Biomedia Cubes - 2 Cubic Foot = 120 +
Answer by: Connor on Jun 16, 2016, 11:44 AM
I currently use live rock rubble and large pore foam as a transport method to move pods from my fuge directly to the display. This has worked wonders for my mandarins and pipefish. Are pods attracted to these?
Question by: Eddie Purcell on May 7, 2016, 5:23 PM
Great question!
The Marinepure works amazing as housing for Pods and will be a fantastic addition. Feel free to let us know if you have any further questions!
Answer by: Connor on May 10, 2016, 5:09 PM
I keep reading about how many square feet each of the various cubes represent, but I'm curious how that corresponds to something like a similar sized piece of various reef rocks, or a similar volume of sand.

It's easy to dazzle with numbers "look at how large this number is!" but without a point of reference it's hard to see how useful this is.

Also assuming it's super useful, will these majorly restrict water movement? So if I put one block along the width of my sump would water back up behind it?
Question by: Micheal on Apr 20, 2016, 7:14 PM
Great question! We have made a few videos on the topic as well as included a link below to the technical information as to how much marinepure would be needed per gallon as replacement for live rock. This would restrict flow if fully spread across the sump and in most cases we recommend some access for water to flow around.
Answer by: Connor on Apr 26, 2016, 6:40 PM
How many 2" cubes come in the marinepure ceramic bio media .The dimensions for my sump are 7 1/2"x9",should I get the 8x8x4 and cut it or use the cubes?
Question by: Alex on Apr 11, 2016, 6:19 PM
Great question!
These will come with around 20 cubes. The 8x8x4 might be easier to work with as it is a single block. Feel free to let us know if you have any further questions!
Answer by: Connor on Apr 14, 2016, 4:13 PM