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Calcium Carbonate as a Substrate?

This is a discussion on Calcium Carbonate as a Substrate? within the Water Chemistry forums, part of the Advanced Saltwater Discussion category; --> So where I posted this in the freshwater section, Byron said not to use it. Posted via Mobile Device...

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Calcium Carbonate as a Substrate?
Old 09-02-2010, 06:13 PM   #11
 
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So where I posted this in the freshwater section, Byron said not to use it.
Posted via Mobile Device
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Old 09-02-2010, 06:18 PM   #12
 
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Quote:
Originally Posted by Byron View Post
You cannot and should not use pure calcium carbonate as a substrate. I suspect your friend is correct, it would turn to cement or something similar. Calcium carbonate (CaCO3) is a substance found within certain rocks, shells (of marine creatures), etc. It is usually available as a powder, and used in lime for instance for gardens.

When we refer to certain types of rock (limestone, marble, dolomite), shells (of crustaceans) and coral as being calcareous, that means these materials contain calcium carbonate.

Calcium and magnesium are the two prime minerals that create hardness in water when they dissolve into it. Water running over limestone will be hard due to the dissolved calcium. In aquaria, this is fine for livebearers that need hard water, or rift lake cichlids. But in a tank of soft water fish it will work contrary to the needs of the fish.

As for substrates, speaking only from the fish aquarium perspective, I am only aware of those made with dolomite, crushed coral, marble, limestone; the calcium carbonate in these materials as I mentioned above will raise the hardness and corresponding pH of the water.

Byron.
Seems to me like he's saying it'd be fine as long as your fish needed hard water?
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Old 09-02-2010, 07:07 PM   #13
 
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no it rad as though it should not be used at all.. and based on this members very extensive knowledge i would take his advice at face value....
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Old 09-02-2010, 09:09 PM   #14
 
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Originally Posted by bearwithfish View Post
based on this members very extensive knowledge i would take his advice at face value....

boo :(

It woulda been cool
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