Indo-pacific Black, Marine Aragonite Substrate Functional and beautiful aragonite substrate for all types of marine aquariums. Contains millions of beneficial marine bacteria to enhance biological filtration. Slowly releases calcium, carbonate and beneficial trace elements -...[more]

Florida Crushed Coral - it is the only crushed coral with aragonite, which provides up to 25 times the buffering power of other crushed corals, dolomite, or oyster shell. Use in undergravel filtered systems or reverse flow beds. A solid and economical performer. Grain size...[more]

Carib Sea Carribean Live Sand. Simply Natural - Enjoy this real Caribbean live sand in a breathable bag with no added chemicals or special processing. Simply Effective - This live sand utilizes patent pending Sea Breathe laser technology which preserves real life sand with...[more]

• This specially graded marine sand is guaranteed to contain a high percentage of algal oolites. The algal oolites are highly porous and provide a perfect habitat for de-nitrifying bacteria. • Due to their uniquely porous nature, oolites can house several hundred times more...[more]