high pH suitable iron chelate UK source

[Andy Pierce]

Anyone got a good UK source of chelated iron suitable for high pH, e.g. Fe-EDDHA or Fe-HBED? Any options as part of a trace element mix so like Solufeed TEC except with not Fe-EDTA?

 

[Paul Willi]

Hi
solufeed Fe7 EDDHA regular works for me 👍
Cheers
Paul

 

[G H Nelson]

Hi
solufeed Fe7 EDDHA regular works for me 👍

Fe 6.0 EDDHA Extra 1kg

Fe EDDHA iron fertilizer containing 6.0% water soluble iron for preventing and correcting iron deficiency in most plants especially calcifuge

solufeedshop.com

Cheers
Paul

Or Amazon product ASIN B00M48LGKO

 

[Andy Pierce]

Those using Solufeed TEC which comes with Fe-EDTA, do you add the Fe-EDDHA as well? No worries about too much iron?

 

[John q]

Those using Solufeed TEC which comes with Fe-EDTA, do you add the Fe-EDDHA

I add dtpa fe to solufeed mix, see no reason why you couldn't add eddha into the mix.

 

[Paul Willi]

Yes I add sodium free tec & fe7 eddha mixed with macros 👍

 

[Andy Pierce]

I'm going to have a go with Solufeed Rapid, iron EDDHSA chelate. They say for hydroponics use 39 ml in 1000 L give 1 ppm Fe. If I math it up right, that means 0.1 ml in the 12.5 L Shrimphaus will do 0.2 ppm weekly Fe. The liquid formulation is convenient and a 1 L bottle will last me 192 years...

 

[_Maq_]

No worries about too much iron?

Within normal pH range (5 to 8), trivalent iron is non-toxic for plants and animals. Bivalent (reduced) iron is somehow different story. Plants must oxygenate their rhizosphere to avoid excess uptake of iron. As for the fish, bivalent iron gets oxidized to trivalent in their gills, precipitates there and hinders their functionality.
In general, the best protection against iron toxicity is well-oxygenated water column.
Also, excess iron in the sediment prevents forming hydrogen sulfide.

 

[Andy Pierce]

I gave it a go with Fe-EDDHSA but the stuff is very strongly brown coloured. Here it is added to a final concentration of around 0.2 ppm. What final concentration are people using these high pH stable iron chelates at and is the colour an issue for you? @Paul Willi @GHNelson

-Andy

 

[Paul Willi]

Hi Andy
ive not used a premade liquid, my water is clear, when I started with eddha, there was a build up towards the end of the week as I noticed a tinge to the water. i reduced my dosing, now have clear. I dose daily with homemixed liquid dosing ferts, weekly about 0.5g of eddha is added to 180l with co2.
cheers
Paul

 

[Andy Pierce]

Hi Andy
ive not used a premade liquid, my water is clear, when I started with eddha, there was a build up towards the end of the week as I noticed a tinge to the water. i reduced my dosing, now have clear. I dose daily with homemixed liquid dosing ferts, weekly about 0.5g of eddha is added to 180l with co2.
cheers
Paul

Cheers. What % Fe-EDDHA is your powder?

 

[Paul Willi]

7%

 

[Zeus.]

When I was using Fe EDFHA, I added enough to give the water the slightest pink tinge, then as long as the pink tinge was visible the Fe EDDHA was available for the plants to uptake

 

[keef321]

I gave it a go with Fe-EDDHSA but the stuff is very strongly brown coloured. Here it is added to a final concentration of around 0.2 ppm. What final concentration are people using these high pH stable iron chelates at and is the colour an issue for you? @Paul Willi @GHNelson

-Andy

I do not get any tint (that I notice) in the water dosing an iron mix of 0.021ppm FeEDDHA, 0.5ppm DTPA and 0.5ppm seachem iron. My FeEDDHA is from bioly.

 

[Andy Pierce]

After some experimentation, I find that Fe.EDDHSA to a final concentration of 0.02 ppm (v/v) is essentially colourless.