Ocean Direct Caribsea...
Aragonite is used by the foremost public aquariums, research and government institutions, and professionals worldwide.
Proven to reduce nitrates
NO RINSING!
FREE Bio Magnet bacteria re-locator/clarifier pack inside!
Contains more than 7,000 ppm naturally occuring Strontium
OD OOLITE
CRS SAND OCEAN DRCT OOLITE 40#