CaribSea Seaflor Aruba Puka Shells Substrate 18 lbs
The perfect shell substrate. Clean and pure with no dangerous impurities to threaten your aquarium. May be used on it's own or as a colorful ad mixture to other products. Caribbean sea Aruba shells offer buffering capabilities that are superior to oyster shell, coquina shell, calcite, dolomite, and most varieties of beach collected shell.
· Natural and free from impurities
· Actual sea floor mix of sand and shells
Average small grain size 7.0mm
Average large grain size 3.0mm