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Q: I have been using Reef Carbonate for about 6 months. I have received 2 separate 2 liter bottles of the additive. Each time the bottle contained about 1/4 inch of crystals in the bottom of the bottle. It has been cold when I received each shipment. What is causing this? Is there reason for concern? Do I have to wait for the crystals to dissolve before dosing in the aquarium?
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.
Q: What is the differrence between Reef Carbonate and Reef Builder?
A: Reef Builder is the powdered version of Reef Carbonate. They are identical products for the most part. There is a slightly different blend of salts used to make Reef Carbonate than the salts used in Reef Builder. We do this to make Reef Carbonate (liquid) as concentrated as possible. The end result is the same regardless of the product you choose.