Collection: Caribsea

Substrate is the one part of a build that's hard to change later. CaribSea has been grading aquarium sands and gravels since 1972, matching mineralogy and grain size to the job rather than selling one generic bag. The marine side runs to Arag-Alive Fiji Pink and Special Grade, Ocean Direct live sand, Seafloor Special Grade and Florida Crushed Coral; freshwater options include Crystal River and Gemstone Creek. LifeRock covers aquascaping in branch, arch, donut and shape forms, plus the Nano Reef Kit. Sand and rock ship at actual freight cost. Grain size decides whether sand stays in place under strong flow.