Fe DTPA 10% Stock solution - The Planted Tank Forum
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post #1 of 3 (permalink) Old 11-16-2015, 02:42 AM Thread Starter
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Fe DTPA 10% Stock solution

I just bought from amazon this iron:

it says it is Fe DTPA 10% but the problem is i dont have the calculations for a stock solution. My target is 0.1 ppm in my 100 liter tank, would appreciate a lot if someone could help me.
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post #2 of 3 (permalink) Old 11-16-2015, 03:45 AM
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To get 0.1 ppm in 100 liters tank with a 10 % stock solution you would need 0.1 cc(ml) of it.

If it is too small for you to measure then dilute 1 cc of the stock in 9 cc of distilled water - shake - use 1 cc of the diluted solution for your tank.

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post #3 of 3 (permalink) Old 11-16-2015, 06:21 AM
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My long hand maths.

((amount added in grams * 1000) / volume of water) * 10%

1 gram added to water * 1000 = 1000
1000 / 100 liters = 10
10 * 10% = 1

So 1 gram of 10% Fe added to 100 liters will add 1ppm.

For the solution.
Size of dosing container / size of dose * amount needed to reach desired concentration. So if we want to target 1ppm in 100 liters of water.

500ml / 5ml = 100
100 x 1 gram = 100

So adding 100grams of 10% Fe to a 500ml container, will give 100 doses of 1ppm Fe to 100 liters of water with a 5ml dose. Plugging the numbers into a spreadsheet makes life easier.

Feel free to edit.
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