Tropical Fish Keeping - Aquarium fish care and resources

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-   -   Rocks to add iron to water? (http://www.tropicalfishkeeping.com/beginner-planted-aquarium/rocks-add-iron-water-67366/)

DKRST 04-07-2011 06:20 PM

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?

Byron 04-08-2011 06:15 PM

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.

DKRST 04-08-2011 07:31 PM

Thanks Byron, I had not even thought about other potential minerals! Better to use that rock in the yard then.

redchigh 04-14-2011 10:58 AM

Red slate does get its color from iron, but due to it's structure it's still inert.

DKRST 04-14-2011 04:21 PM

Quote:

Originally Posted by redchigh (Post 647920)
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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