Green Leaf AQ - 11% DPTA Iron Chelate Q's?

2424 Views 8 Replies 3 Participants Last post by UDGags, Mar 10, 2014

MERSF559

Discussion Starter · Mar 10, 2014

im thinking of purchasing some iron for my 20 long to bring out the reds in some of my plants but not too sure on how much to dose.

Im thinking of getting some iron chelate from GLA. I notice that theres is a 11% DTPA. Would that be okay for my 20 gal? pH around 7.0-7.5

How much would i need to dose, tspn wise, and how often? once a week or every time i dose my micros?

thanks everyone, advice and tips would be really helpful.

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UDGags

· #2 · Mar 10, 2014

344mg 2-4 times a week if you want EI levels. If you have another iron source in your micro's you might want to cut back a bit. The only thing to avoid dosing/mixing with iron is phosphates because they will precipitate out.

http://rota.la/ is a great calculator...set 20 gallon, DIY, select DTPA 11%, dry dosing and The Estimative Index to get the values I gave you.

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MERSF559

Discussion Starter · #3 · Mar 10, 2014

UDGags said:
344mg 2-4 times a week if you want EI levels. If you have another iron source in your micro's you might want to cut back a bit. The only thing to avoid dosing/mixing with iron is phosphates because they will precipitate out.

http://rota.la/ is a great calculator...set 20 gallon, DIY, select DTPA 11%, dry dosing and The Estimative Index to get the values I gave you.

if you mean percipate out, are you saying that they would have no effect on the ppants in making them grow?

and what is 344 mg in tspns?

I currently dont have a scale

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happi

· #4 · Mar 10, 2014

here use this 3x week

Your addition of 1.0 tsp DTPA Fe (11%) to your 500.0 mL water, with doses of 10.0 mL to your 20.0 gal aquarium adds
Element ppm/degree
Fe 0.11

make a solution of 500ml DI/RO water and add 1tsp of DTPA 11% and dose 10ml 3x week, this will give you good enough Fe.

BTW plants are not red due to Fe only, it also depends on good lights, water temp, Magnesium etc and more.

BTW PO4 doesn't react if the PH of the water is low and iron is in Chelate form.

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UDGags

· #5 · Mar 10, 2014 (Edited by Moderator)

If you put iron and a phosphate together they will react and you will get a powder in the water column. So do not dose these together.

1 teaspoon is 4.929cc
The bulk density of the powder is around 0.6-0.7 g/cc
So 0.344g * 0.6 g/cc gives us 0.573 cc.
This is 1/10th of a teaspoon roughly.

happi said:
BTW PO4 doesn't react if the PH of the water is low and iron is in Chelate form.

What pH is that? I figured since his was 7-7.5 it might.

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MERSF559

Discussion Starter · #6 · Mar 10, 2014 (Edited by Moderator)

UDGags said:
If you put iron and a phosphate together they will react and you will get a powder in the water column. So do not dose these together.

1 teaspoon is 4.929cc
The bulk density of the powder is around 0.6-0.7 g/cc
So 0.344g * 0.6 g/cc gives us 0.573 cc.
This is 1/10th of a teaspoon roughly.

if idose iron 1 day abd phosphats the next day, would I be okay?

happi said:
here use this 3x week

Your addition of 1.0 tsp DTPA Fe (11%) to your 500.0 mL water, with doses of 10.0 mL to your 20.0 gal aquarium adds
Element ppm/degree
Fe 0.11

make a solution of 500ml DI/RO water and add 1tsp of DTPA 11% and dose 10ml 3x week, this will give you good enough Fe.

BTW plants are not red due to Fe only, it also depends on good lights, water temp, Magnesium etc and more.

BTW PO4 doesn't react if the PH of the water is low and iron is in Chelate form.

Thanks! this will diff help out

happi said:
here use this 3x week

Your addition of 1.0 tsp DTPA Fe (11%) to your 500.0 mL water, with doses of 10.0 mL to your 20.0 gal aquarium adds
Element ppm/degree
Fe 0.11

make a solution of 500ml DI/RO water and add 1tsp of DTPA 11% and dose 10ml 3x week, this will give you good enough Fe.

BTW plants are not red due to Fe only, it also depends on good lights, water temp, Magnesium etc and more.

BTW PO4 doesn't react if the PH of the water is low and iron is in Chelate form.

would this solution also work with nicolg 10% iron cheated?

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UDGags

· #7 · Mar 10, 2014

MERSF559 said:
if idose iron 1 day abd phosphats the next day, would I be okay?

Yes, you would be fine after a few minutes in all likely hood. I personally dose one in the morning (macros) and one in the evening (micros).

If you use 10% the weights would be slightly different. Most likely you would be close enough that it doesn't matter.

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happi

· #8 · Mar 10, 2014

UDGags said:
What pH is that? I figured since his was 7-7.5 it might.

this is true when making solution, you have to make a acidic solution with PH of around 6.5 or less. it is true that hard water with PH of 7+ will more often see the PO4 and Fe reaction, but different chelate are still more stable than the others, for his water i would highly recommend using DTPA.

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UDGags

· #9 · Mar 10, 2014

happi said:
this is true when making solution, you have to make a acidic solution with PH of around 6.5 or less. it is true that hard water with PH of 7+ will more often see the PO4 and Fe reaction, but different chelate are still more stable than the others, for his water i would highly recommend using DTPA.

Okay, thanks for the info.

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