FAQ: My Seachem Reef Carbonate™ has white crystals in the bottom of the bottle. Is this normal?

A: The white crystals you see are normal for that product when exposed to cold temperature. Once the product warms up, you should be able to shake the bottle and get them to re-dissolve. If you have a hard time getting the crystals to re-dissolve, try heating some water (luke warm) on the stove and setting the bottle in the water for a few minutes before shaking.