Dosing Manganese EDTA - The Planted Tank Forum
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post #1 of 3 (permalink) Old 07-18-2014, 02:18 AM Thread Starter
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Dosing Manganese EDTA

I'm looking to improve my micronutrient by replicating the Tropica Plant Nutrition DIY mix...I've got CSM+B, Iron DTPA 11% and EDTA 13%. I also have some Manganese EDTA...but am unsure of how much to add to the mix since the tropica clone formula utilizes MnSO4. Here are some resources on the product that I have. Any suggestions?
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post #2 of 3 (permalink) Old 07-18-2014, 11:49 AM
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Your last link shows the product is 12.8% Mn.

I'm not sure which Tropica formula you want. Tropica Master grow has 0.04% Mn. So adding 615 mg 1.562 gm of your Mn EDTA in 500ml of water will create a solution with 0.04% Mn.

Edit: Sorry, math error. The correct amount is 1.562 gm. Btw, you could use this calculator using DTPA Fe 13%. The math is pretty close 12.8% versus 13%. Just use your container size in place of tank size. Convert 0.04% to ppm which would be 400ppm (move the decimal 4 places). Then use "what dose to reach a target" for the "and I am calculating for" selection. Just ignore the teaspoon weights since they would be different.

Last edited by Zorfox; 07-18-2014 at 12:23 PM. Reason: error
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post #3 of 3 (permalink) Old 07-18-2014, 01:07 PM Thread Starter
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Thank you Zorfox! It didn't cross my mind to use the same calculations as the iron. I'll look back at the tropica formulas...I don't remember which one I was looking at the other day. I believe it was the Master Grow because I kept seeing "TGM"
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