Dry chelated Iron

[Aquafreak]

I just got some of this stuff in a flower nursery, it's 100% iron. Anyone know the dosage rate of these things? Dry dose or mixed with water? How much?

Thanks for your time.

 

[ChilDawg]

Found something with details on dosing chelated iron: http://www.thekrib.com/Plants/kelly-intro.html

 

[Aquafreak]

That link to the krib mainly talks about dosing Iron "tablets" from nurseries, however I have the powder form which would be impossible for me to use them like jobe sticks.

Thanks for reply

 

[wetmanNY]

Remember, iron is a micronutrient, not a macronutrient. It is toxic in concentrations >5ppm.

 

[Aquafreak]

Thanks for the heads up wetman, I'm trying not to use any of this powder till I find a more reliable method of dosing.

 

[ChilDawg]

But you could figure out the amounts in the tablets based upon percentages and tablet weight...

 

[a_free_bird73]

Does it have any lable that tells you what the concentration of Iron is?... If it is EDTA chelate, then Iron concentration is 12% of the powder by weight... So if you want a 0.5ppm concentration then you need 0.5mg / 0.12 = ~4mg/litre or ~16mg/gallon (1 gram = 100 mg)

That is not a lot and you will need some way of measuring it (You can make a stock solution, but it is not stable in the long run and I prefer to weight it every time, but you will need fine scales to do that)

 

[Aquafreak]

It does give concentrations of it on the back
IRON (Fe) as a complex of EDTA 13%W/W

 

[Aquafreak]

Just realised freebird is in melbourne, well maybe you've seen this item before in nurseries or hardware stores, it's Manutec Garden Care Products, Iron chelate

 

[Aquafreak]

According to your calculation I'd need about 1 teaspoon to get 0.5ppm of iron. I'll give that a try, I just hope my Seachem iron test kit is accurate.

Thanks for replys