this is how it looks..
* Has tremendous surface area, up to 1500 square feet of bacteria rich biofilm per pound.
* Contains a broad spectrum of natural bacteria as well as specially selected strains of marine bacteria.
* Creates a natural biological balance making the cycling of new aquariums faster and safer.
* Controls dangerous ammonia levels and reduces nitrite and nitrate.
* Provides unsurpassed buffering capacity, supporting the proper pH (8.2) of seawater.
* Delivers more calcium, carbonate buffer, and essential trace elements like strontium and magnesium than other brands.
* Fine grade is .50- 1.85 mm grain size.