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post #1 of 20 (permalink) Old 11-02-2015, 07:13 PM Thread Starter
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Iron

Hi all
I am sure this has been asked a thousand times over
But can't seem to find it

I want to start adding 13.2 % chelated iron to my tank
Can anyone advise on what the target ppm is
And how to calculate how much to add

Thanks
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post #2 of 20 (permalink) Old 11-02-2015, 10:54 PM
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I can help you with dosing amounts but it depends on what you are looking to accomplish? Are you adding any already? Most micronutrient ferts already have some included. What size tank?
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post #3 of 20 (permalink) Old 11-03-2015, 07:59 AM Thread Starter
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thanks for the response
I am looking to add iron for better colouration especially to bring out the red in my Ludwigia arcuata
as this is very green at the moment.
my tank is 220 litres / 28 us gallons and my trace elements contain 8.2% FE

thanks
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post #4 of 20 (permalink) Old 11-03-2015, 05:18 PM
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Do you EI dose? I looked into adding iron to my tank as well and the person I asked said to put 1/3rd of what you'd dose in micros.

So in a 500 ml solution for a 100 gallon tank. I'm just using numbers here, not accurate. If it requires 9 tablespoons of trace, then you would add 3 Tablespoons of iron to the mix.
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post #5 of 20 (permalink) Old 11-03-2015, 05:38 PM
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ppm of the 13.2% Fe solution = ((amount added in grams * 1000) / volume of water in liters) * 13.2%

Or just use a calculator with a nice GUI: Zorfox's Planted Tank Calculator

Feel free to edit.
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post #6 of 20 (permalink) Old 11-03-2015, 08:25 PM Thread Starter
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cheers lads

wickedOdie this is along the lines of what the supplier of the Salts I got gave for dosing
only problem I have with this is. it does not tell me what my Iron levels would actually be

Audionut not following you calculation there as I am a slow with these things LOL
however the calculator is very useful thanks

what level of FE do people usually target ? am I right in saying between 0.2 - 0.5 ppm

thanks again
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post #7 of 20 (permalink) Old 11-03-2015, 09:05 PM
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Quote:
Originally Posted by nilocg View Post
I can help you with dosing amounts but it depends on what you are looking to accomplish? Are you adding any already? Most micronutrient ferts already have some included. What size tank?
I agree

What type of tank do you have? There are many spectrum of tanks ranging from Low tech (low light, little water changes and no CO2) to High tech (high light, frequent water changes and CO2 injection) and many shades in between. The water changes being the most important when it comes to fertilizing.

As Nilocg said most trace mixes have iron in them. It's quite possible you don't need additional iron.

I've never noticed increased color with iron to be honest. Once you have enough that's all the plants need. More won't make a difference. Increasing light, limiting nitrogen and to an extent higher GH can improve coloration.

The best way to get vibrant reds is to choose plants that are truly red and take good overall care. If a red plant is happy it will display it's color. Adding red spectrum lighting also makes reds pop more.
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post #8 of 20 (permalink) Old 11-03-2015, 10:18 PM Thread Starter
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Cheers
I am running a high tech EI tank
Dry ferts / High light co2 injected and 50%+ water changes a week

I am only learning but was of the belief
fe helped with colour. But probably have this totally wrong

The trace elements I use state 8.2% fe
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post #9 of 20 (permalink) Old 11-03-2015, 11:05 PM
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Quote:
Originally Posted by The Dawg View Post
Cheers
I am running a high tech EI tank
Dry ferts / High light co2 injected and 50%+ water changes a week

I am only learning but was of the belief
fe helped with colour. But probably have this totally wrong

The trace elements I use state 8.2% fe
A 3:1 ratio of trace mix to iron is a good ratio IMO. If you want extra iron target a dose of 0.125 ppm in addition to your trace mix dosing.

If your'e using my calculator then select your iron, assuming DTPA 13%, then enter 0.125 in the concentration box and calculate. That's about all there is to it.

I didn't mean that iron does not increase reds. Many people swear by it. However, unless I have experienced it and concluded that was indeed the cause I can't say for sure. I simply have never seen the connection. Myth? Who knows. I've never tried to disprove it lol.

If I may ask, what trace mix are you using? I don't have any trace mixes that are 8.2% iron in my calculator. If you have something I don't have listed I can add it.
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post #10 of 20 (permalink) Old 11-03-2015, 11:29 PM
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As far as I understand adding extra iron by itself does not help increasing the redness of plants.
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post #11 of 20 (permalink) Old 11-03-2015, 11:30 PM
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If Fe is sufficient, adding more won't do anything to plants. Plants don't become red with more Fe, they become more red with more anthocyanin content. The only way to induce the production of anthocyanin is to use the correct color spectrum.
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post #12 of 20 (permalink) Old 11-04-2015, 12:37 AM
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Originally Posted by Solcielo lawrencia View Post
If Fe is sufficient, adding more won't do anything to plants. Plants don't become red with more Fe, they become more red with more anthocyanin content. The only way to induce the production of anthocyanin is to use the correct color spectrum.

I also dont believe that being deficient in iron causes plants to loose their redness. Correct me if I am wrong.
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post #13 of 20 (permalink) Old 11-04-2015, 12:41 AM
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Fe is immobile. If there is deficiency, it will show in new growth.
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post #14 of 20 (permalink) Old 11-04-2015, 12:44 AM
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Fe is immobile. If there is deficiency, it will show in new growth.
Good point
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post #15 of 20 (permalink) Old 11-04-2015, 03:22 AM
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If your lights don't have a strong red spectrum the red in your plants would be weak. The production of other than the green pigment in plants is for protection from intense light - its like a sunscreen to reflect away an unwanted part of the spectrum. If your lights are intense enough and have a strong red spectrum, your plants will produce anthocyanin which will make it look red/violet depending on the genetics of the plant. Yes nutrients come into play; but only to the extent that keeps the plant healthy and deficient free.

Anthocyanin in plants have been noticed to be produced in other stress conditions - but those are in the realm of unhealthy conditions, pathological and environmental.

If you have a choice, you have a problem, till you elect your choice. No choice, no problem, only consequences, learn to live with them.
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