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Home » Saltwater Aquarium Supplies » Additives & Supplements » Calcium » Dry Supplements » E.S.V. Calcium Chloride

E.S.V. Calcium Chloride

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Calcium Chloride is a very pure anhydrous grade free of phosphates and nitrates. The advantage of using Calcium Chloride as a calcium supplement in marine aquaria is its very high solubility in water. This property allows the aquarist to rapidly adjust calcium concentrations to desired levels. The aquarist should be aware that Calcium Chloride does not add bicarbonate and carbonate ions to the system. Since most calcifying organisms require these ions in addition to calcium ions, the aquarist should monitor the alkalinity frequently when using Calcium Chloride and make the proper adjustments with a buffer additive. Calcium Chloride can directly reduce alkalinity by elevating the calcium ion concentration to excessively high levels and thereby initiate the precipitation of calcium carbonate from the water. This may or may not be visibly detectable, depending on the magnitude of precipitation. Excessive use of Calcium Chloride may disrupt the balance of ions in a marine system by the continued addition of chloride ions. Since saltwater contains such a large concentration of chloride ions, it would take a very long time before significant chloride imbalance would occur, especially if water changes are performed. We recommend Calcium Hydroxide as a better long-term calcium supplement, but Calcium Chloride can be very useful in restoring proper calcium ion levels should they drop while using Calcium Hydroxide. 1 teaspoon will raise the calcium level by about 50 ppm in 10 gallons of water.

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4 of 4 people found the following review helpful:

Excellent!

It does its job by ROB WEST

Experience Level: Intermediate

Posted on 8/10/2007 from OSPREY, FL UNITED STATES

Comments: In converting a FOWLR to a reef tank, I had gotten my alkalinity too high while calcium was low. Most of the calcium supplements are designed to balance a boost in calcium with a buffer for alkalinity and I only needed half of this. Calcium Chloride is perfect for this out of balance situation. It boosts calcium without raising alkalinity. This ESV product worked as it was supposed to. It's not for long term use but for the set of circumstances described, it does its job.
Yes, I would recommend this product to my friends.

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1 of 1 people found the following review helpful:

Excellent!

Works great by MIKE SUTTON

Experience Level: Intermediate

Posted on 11/30/2007 from LOS ALTOS, CA UNITED STATES

Comments: I was low on calcium and my calcium reactor was just making alkalinity so I talked to Julian Sprung (coauthor of The reef aquarium) he suggested I try to find use a powder form of “Calcium Chloride” to kick start the tank. I used this product and my calcium went up and stayed up over two weeks and still going strong and… so did my alkalinity. I am now wondering if I even need the calcium reactor? At this point this is more reliable, less tweaking and this will last me well over a year. By the way... I tried other calcium product be fore to do this but they did not work!
Yes, I would recommend this product to my friends.

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