I'm dosing an all in one EI solution. The chelated iron does not react with the phosphate due to the ascorbic acid I add according to the recipe I follow. The pH of the solution ends being less than 6 because of the acid and I also use distilled water. I dose at night just before going to sleep because I usually forget to do it in the morning. My tank's pH is around 7.3 without the CO2 at night.
If I dose at midnight would the plants use any of the iron before it reacts with the phosphate? How long does it take for the iron to bind with the phosphate normally? Thanks.
The ascorbic acid is supposed to drop the pH so that the chelated iron does not react with the phosphate. I'm basically wondering if plants will absorb nutrients at night or only when the lights are on?