Rocks to add iron to water?
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Rocks to add iron to water?

This is a discussion on Rocks to add iron to water? within the Beginner Planted Aquarium forums, part of the Beginner Freshwater Aquarium category; --> Will rocks containing iron add any significant iron to a planted tank's water? I found some rocks I used in my old un-planted tank. ...

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Rocks to add iron to water?
Old 04-07-2011, 05:20 PM   #1
 
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Rocks to add iron to water?

Will rocks containing iron add any significant iron to a planted tank's water?
I found some rocks I used in my old un-planted tank. The rocks appear to contain some type of iron, they have what looks similar to "rust" staining from minerals in the rock.

I also have some red slate - does it's color derive from iron in the rock?
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Old 04-08-2011, 05:15 PM   #2
 
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I would be very careful with rocks leeching "rust" which might well be iron, or copper, or... ? This could poison the fish (and plants too). Iron after all is a heavy metal, and all heavy metals are toxic to all life. Which is why one has to be careful dosing minerals.

I don't believe red slate has any connection to iron, but I will defer to the view of a geologist.
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Old 04-08-2011, 06:31 PM   #3
 
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Thanks Byron, I had not even thought about other potential minerals! Better to use that rock in the yard then.
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Old 04-14-2011, 09:58 AM   #4
 
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Red slate does get its color from iron, but due to it's structure it's still inert.
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Old 04-14-2011, 03:21 PM   #5
 
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Quote:
Originally Posted by redchigh View Post
Red slate does get its color from iron, but due to it's structure it's still inert.
Thanks, good to know!
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