- Extremely porous ceramic filtration medium providing highest possible surface area for bacterial colonization for biological filtration for use in ponds & all aquariums with a pH of 7.5 or greater.
- Each liter provides over 40,000 square feet of surface area internally for bacterial colonization.
- Provides nitrification and vast amounts of anaerobic or anoxic surface area to foster denitrification.
- Will reduce the levels of toxic ammonia, nitrites and nitrates, phosphates and organic pollutants in all aquaria.
- Available in 9x4.5x2.5" brick.
- Made in the USA.
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