The most common reef salt in North America. Regular for FOWLR, Reef Crystals for reef, Sea Salt for QT. Baseline benchmark.
The default reef salt in the US market. Regular Instant Ocean is used on FOWLR + softies; Reef Crystals adds calcium + trace boost for SPS/LPS. Consistent batch chemistry, wide availability, sub-$1 per gallon mixed. What most reefers start with.