Iron DTPA Solution

[overskim]

I have some Iron DTPA 11%. I need to figure out some kind of a solution that is easy to calculate results in the aquarium.

Say I have 100 gallons. I need someone to show me the correct math so I can have a safe starting point. I am not a chemist but I think I can get it from there.

Thank You!

[overskim]

Ok, here is what I have so far. If I mix a solution of 10g/L and dose 1 mL of the solution it should add 1.1 mg of iron to the tank.

10g / L Solution, 1mL dose should be 10mg FeDTPA 11%

10mg * .11 = 1.1mg Iron

If I add 5mL to a 100L system I should get .055ppm.

5ml * 1.1mg = 5.5mg
5.5mg/100L = .055ppm

Am I on the right track?

Thanks

[bertoni]

That looks about right to me. :)

[Randy Holmes-Farley]

What dosing amount are you trying to target?

FWIW, I discuss iron dosing amounts here:

First Iron Article: Macroalgae and Dosing Recommendations
http://www.advancedaquarist.com/issues/aug2002/chem.htm

[overskim]

I really don't know what level yet. Probably the lower detection of a good test. I would like to find the amount (and a chelator) that will provide iron for 3-4 days and then leave the system undetectable for the rest of the week.

[Randy Holmes-Farley]

As I indicate in the article, no kit can test anywhere near NSW levels, so IMO, testing is not worthwhile and I do not recommend adding enough to actually detect it. :)