Brightwell Xport BIO Cubes

Brightwell Xport BIO Cubes


  • $14.99

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Xport BIO Cubes

Ultra-porous Biological Media with Superior Performance Characteristics


  • Designed to be used in marine and hard freshwater aquariums with a pH of 7.5 or over
  • Utilizes NanoIntelex Technology to create an enhanced material with vast surface area for colonization by beneficial nitrifying bacteria, resulting in rapid and efficient conversion of ammonia into nitrite and nitrate.
  • Providing over 71,000 square feet per liter, it provides the highest colonizable surface area to volume ratio of synthetic or natural biological filtration media available anywhere in the world.
  • Higher efficiency relative to conventional media results in smaller space requirements to achieve equivalent nitrification.
  • May be employed to rapidly decrease ammonia and nitrite concentrations in even the most heavily-stocked aquatic systems.
  • May be used in conjunction with Xport NO3 Cubes and Xport PO4 Cubes


250ml | 500ml | 1,000ml | 2L | 4L | 20L

Instructions   Guidelines

Read all instructions before use. Use about 2 to 4 XPort Bio Cubes for every 10 U.S. gallons ( 38 L ) of system capacity, more for heavy bio loads. Rinse material well with aquarium water or purified tap water. For superior results, seed the material using FlorinBacter7, MicrōBacter7 or MicrōBacterCLEAN, as appropriate for your aquarium, by placing XPort Bio Cubes in a plastic container, filling it with aquarium water, and then adding the full recommended dose of either bacterial product, based on the size of your aquarium, to that container. Allow to stand overnight and then add the seeded XPort Bio Cubes to your system. Discard the soak water. It is recommended that you use sponge, fine filter floss or other mechanical filtration ahead of XPort Bio Cubes to prevent clogging with organic material. For maximum results, also provide a good carbon source for growing bacteria, such as Brightwell® Katalyst bio pellets or liquid Reef BioFuel or FlorinAxis as appropriate for your aquarium, as directed on their label. For maximum nitrification, place in an area of good flow with good oxygenation.


Do not fluidize or allow to rub against other filtration material which could cause grinding down.

Xport Bio Cubes is not a chemical filtration media; it must be seeded with appropriate bacteria to begin nitrification. Simply placing Xport Bio Cubes into an established aquarium will slowly seed the media, however seeding with MicroBacter7 as directed above will significantly decrease cycling time and therefore results in faster colonization. If plants and/or zooxanthellate invertebrates (e.g. corals, clams, etc.) appear to react negatively to the use of Xport Bio Cubes, it may be an indication that nitrogen is being removed too aggressively; NeoNitro or FlorinGro may be employed to provide nitrogen as nitrate, and feeding with the appropriate foods is necessary for all zooxanthellate invertebrates. Note that the required amount of Xport Bio Cubes may change as the system matures, and as biomass and/or stocking density changes; high-nutrient systems may require a greater ratio of Xport Bio Cubes to water volume, evident as a persistent ammonia presence regardless of how much MicroBacter7 is employed.


This product will work for nitrification, the conversion of ammonia to nitrate and also for denitration, the conversion of nitrate to nitrogen gas.  For maximum nitrification, it is best to provide maximum oxygen to the material, so mount it in air, if possible and trickle water over it.   If you must submerge it, provide very good flow (but do not fluidize!).  For maximum denitration, create an anoxic zone (a zone of very low oxygen) for the cubes by severely limiting water flow through the chamber that you place them in.  If you don't have a suitable anoxic zone, then place the cubes in a plastic jar with a plastic lid.  Drill two small holes in the lid on the top to allow the nitrogen gas bubbles that will form to escape and two small holes near the bottom of the jar on the vertical surface of the side.  All holes should be 3/16" or 5 mm in diameter.  Place the jar in an area of mild to low flow.  This will significantly increase the amount of NO3 that the Xport can remove.


Caution: Keep out of reach of children. Not for human use or consumption.