Red Iron Oxide in Soil? - The Planted Tank Forum
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post #1 of 6 (permalink) Old 01-09-2018, 04:05 AM Thread Starter
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Red Iron Oxide in Soil?

This may sound stupid, but I'm just curious. Has anyone directly mixed powdered Red Iron Oxide directly into the bottom layer of soil/ substrate in their tanks?
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post #2 of 6 (permalink) Old 01-09-2018, 04:30 AM
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Hi Yomicchin,

I haven't used Red Iron Oxide but I have used iron rich lava pebbles....the plant roots actually seem to seek the pebbles and entwine themselves gripping the pebbles so if I pull up a plant it is not unusual to get a pebble with the roots.
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post #3 of 6 (permalink) Old 01-16-2018, 05:42 AM
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How about moroccan red clay powder?


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post #4 of 6 (permalink) Old 01-16-2018, 03:40 PM
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I've seen red clay powder used or red clay rolled into little balls and spread out over the bottom of the tank. I think they need or should be baked or fired maybe if you use actual clay but not 100% on that. I just made a batch of fertilizer balls last night using dry ferts and red clay and the instructions said to dry them out. I haven't done that yet. I'm only going to use 1 or 2 under some S.repens and AR mini to see if I can get some improvement before I add more to the rest of the plants.


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post #5 of 6 (permalink) Old 01-19-2018, 11:55 PM Thread Starter
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Quote:
Originally Posted by Nubster View Post
I've seen red clay powder used or red clay rolled into little balls and spread out over the bottom of the tank. I think they need or should be baked or fired maybe if you use actual clay but not 100% on that. I just made a batch of fertilizer balls last night using dry ferts and red clay and the instructions said to dry them out. I haven't done that yet. I'm only going to use 1 or 2 under some S.repens and AR mini to see if I can get some improvement before I add more to the rest of the plants.
I actually did that for my new tank. Got some AMACO red clay and made a bunch of clay balls.

Thank you to every one else for replying! I was just curious if anyone has attempted it haha
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post #6 of 6 (permalink) Old 02-04-2018, 09:56 PM
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Iron Oxide is not good for the aquarium. I've had things rust in my tank and gotten red algae outbreaks. I had iron slag in a substrate before. Plants can use rusted metal as a source of iron but overall it's not good for the chemistry of the aquarium. If you ever see algae and it's red chances are something is rusting in the aquarium system.
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