I wondered if there is any information about the ratio between manganese and iron. I would like to combine the two into one dosing solution. I notice Kent and Two Little Fishies designed a product for dosing Mn and Fe together. Maybe there is someone here who has an idea about this? I currently dosed a drop of Mn-EDTA containing 9.5 ppb and a few drops of Fe-DPTA/Fe-EDDHA. The Fe-bottle says the solution is combinable with other fertilizers. I assume Mn-EDTA is no exception. If I know the right ratio for macro/micro algea growth.. this would really help. I would just need calculate the daily dosage and add a specific amount to my top-off water. Hopefully someone has an idea of the desired ppm ratio.