Is there a difference between salt and crystals? Petco had crystals on clearance for $2 a box so I grabbed a few. Box was dented
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Just to be perfectly clear. "Crystals" can refer to anything and can mean anything and can have any composition. "Reef Crystals" is a brand name, made by Instant Ocean, and Reef Crystals specifically has higher alk, calcium and magnesium relative to Instant Ocean salt. This is what it looks like:
Best Aquarium Reef Sea Salt | Instant Ocean