Aquaponic Gardening

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Hello all. Ive been spending the night looking through old posts about chelated iron but havnt really seen any brands that someone recommends. if there is a brand that you all use that i can order online can someone please let me know what it is and maybe a website. im getting that yellow leaf right now and would like to correct it. thanks for any help and have a nice day.

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Nate Storey of Bright Agrotech has a great series of videos about Iron and other deficiencies.

This link should point the way to one "Understanding Iron in Aquaponics" 

 http://www.youtube.com/watch?feature=player_detailpage&v=E4_hCA...

I recommend that you watch all Dr. Storey can show you.  and seek a good local garden supplier near you for the correct type of chelated iron. There IS more than one kind and one will be best for your specific need.

Hope this helps.

 

Sylvia sells iron chelate on her site. Comes in various sizes:

http://www.theaquaponicstore.com/AquaIron-DTPA-Iron-Chelate-p/agsas...

Remember, a plant where the new growth has yellowing leaves with green veins has an iron deficiency. If the old growth is yellow with green veins, it's a magnesium deficiency not an iron deficiency. 

James,

Here's another good overview about iron supplementation for aquaponics systems:

http://theaquaponicsource.com/2013/08/15/iron-in-aquaponics/

Sprint 330 is a good DTPA iron chelate

The first video link is not applicable in most peoples cases for 2 reasons. The iron he shows in the video is available at a lower PH than 7 ish that most people keep there system at. The other reason is the kind he chose is also not good because it stains your water red where as the DTPA that you can purchase through the store on this site is a much better option for a non advanced user and does not stain your water red. Those videos are great but you must remember that he has a hydroponic background and thusly is a little more advanced on certain topics and grow methods. His system is awesome if your growing in PH that is a little lower which is great for berry and other advanced plants but not the best for your average user just starting off.

Steve - your first point isn't accurate. Both DTPA and EDDHA are available in the pH range that most aquaponics systems are in (i.e. pH above 7, but below 8)

Don't forget, while Fe-DTPA doesn't add any red hue to the water, DTPA is hightly photodegradeable. That is, studies have found it's half life in water, while exposed to the sun, is 30 minutes. If your water isn't covered - that DTPA is useless. My tank is mostly covered, and I found I had to re-dose DTPA every 3 days.

Let me clarify. I assumed most people keep there ph between 6.6 and 7 where as addha is more aviable between 7 and 8 correct me if im wrong but DTPA is better at slightly below 7. I have found my plants seems to do better when my PH is slightly lower and my fish dont seem to care either. 

Scott Roberts said:

Steve - your first point isn't accurate. Both DTPA and EDDHA are available in the pH range that most aquaponics systems are in (i.e. pH above 7, but below 8)

Don't forget, while Fe-DTPA doesn't add any red hue to the water, DTPA is hightly photodegradeable. That is, studies have found it's half life in water, while exposed to the sun, is 30 minutes. If your water isn't covered - that DTPA is useless. My tank is mostly covered, and I found I had to re-dose DTPA every 3 days.

For iron chelates - there generally is no lower range where they stop working. So DTPA is good up to 7.5ish, and EDDHA is good up to 10.

Thanks everyone. i bought the iron off this website and added it today. is it ok that it added a green tint to my water?

How much did you add to how many gallons of water?

You can find iron chelate in most well-stocked garden stores.  They have it in mine.

Jeremiah - You've seen DTPA or EDDHA in a garden store? Every chelate i've seen in a garden store is either EDTA or citric acid based. 

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