Rocks to add iron to water? - Tropical Fish Keeping - Aquarium fish care and resources
 
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post #1 of 5 Old 04-07-2011, 06:20 PM Thread Starter
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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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post #2 of 5 Old 04-08-2011, 06:15 PM
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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.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #3 of 5 Old 04-08-2011, 07:31 PM Thread Starter
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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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post #4 of 5 Old 04-14-2011, 10:58 AM
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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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post #5 of 5 Old 04-14-2011, 04:21 PM Thread Starter
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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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