Nutrients % in macro

[Subsea]

IMO macro will absorb what is in the water. Meaning it may be higher in one constituent depending on what is in the water. When I operated my 10K gallon macro growout, Red Ogo was grown for human consumption. For enhanced quality control standards, I sent samples of Gravilaria Parvispora to be analyzed by a scientific lab.

The following is dry weight percentages:
Nitrogen @ 2.59%
Phosphorus @ 0.082%
Potassium @ 13.54%
Calcium @ 0.555%
Magnesium @ 1.163%
Sulfur @ 4.81%
Zinc @139ppm
Iron @ 107ppm
Manganese @ 20ppm
Copper @ 7ppm

For me, the biggest surprise was that potassium was 5 fold the concentration of nitrogen. It presents a good justification to dose with potassium nitrate.

 

[cksss]

Thank you for sharing the analysis!
i've been dosing Seachem's Flourish Nitrogen. I think it has abit of everything http://www.seachem.com/flourish-nitrogen.php
Would you still recommend that I suppliment the dosing with Flourish Potassium? http://www.seachem.com/flourish-potassium.php

 

[Subsea]

In reading the provided analysis of Seachem Flourish Nitrogen, I see 2% potash and 1% nitrogen. In the macro dry weight analysis that was done on Red Ogo, the ratio is 5:1.
Unless you are adding potasium with large water changes, I would recommend adding potassium as an individual constituent. That would be Flourish Potassium.

I did not sea phosphate in listed constituents for Flourish Nitrogen. If you are feeding fish, phosphate would come in with the food, but not potassium.

 

[cksss]

Wow! Thank you for the interpretation & analysis
I lost all my red/purple/orange. Left with only green. I've been dosing Seachem Flourish Nitrogen, Iron, Iodine and magnesium on weekly basis. Something is missing and i'm desperate to try something new

In reading the provided analysis of Seachem Flourish Nitrogen, I see 2% potash and 1% nitrogen. In the macro dry weight analysis that was done on Red Ogo, the ratio is 5:1.
Unless you are adding potasium with large water changes, I would recommend adding potassium as an individual constituent. That would be Flourish Potassium.

I did not sea phosphate in listed constituents for Flourish Nitrogen. If you are feeding fish, phosphate would come in with the food, but not potassium.

 

[Subsea]

You are welcome, cksss.

Because I do this for a business, I use miracle grow and add ammonia as required.