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PostPosted: Jul 13th, '16, 01:58 
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Hi

Does anyone know where I can buy some Iron Chelate EDDHA in South Africa - Johannesburg

I saw on myaquaponics they're selling Efekto Wonder Iron Chelate, but the datasheet shows that it's EDTA.

Isn't that toxic and useless in higher (7+) pH?

Thanks
Francois

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PostPosted: Jul 15th, '16, 23:53 
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If you can't find the iron chelate you can spray apply other types of iron and avoid the pH problems. If you have hydroponic stores that's where I'd look for the EDDHA. I probably wouldn't buy the EDTA version since spray applying regular iron will work and it's cheaper.


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PostPosted: Jul 15th, '16, 23:55 
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Oh, thanks. Will the EDTA be fine or is it still considered toxic?

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PostPosted: Jul 16th, '16, 00:07 
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Too much of anything is toxic. If you've already got the bottle and it was sold as a plant iron supplement, then it should have application information and it's probably safe to use it at the concentration listed for spray application. It will work fine as a spray but it won't be effective at higher pH's if added to your system water as you noted.


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PostPosted: Jul 16th, '16, 00:12 
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I should add that it's a good idea to only use it when you actually need it. Some of these products contain small amounts of lead.


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