I didn’t understand well your question… Basically I will simulate the basic… 2 or 3 times in a day I will check the PH and de TDS/PPM sensors and code the algorithm to consider the table above and dilute it with more water to put a lower TDS or if its needs increase, You will choice how much % you wanna get up the TDS (5%,10%) of that week (based on the nutes manufacturer recommendation)
ie: I will prepare a new water. 2 LITERS of water 1ml of nute#1, 4ml nute#2 and 2ml nute#3.
In some hours my sensor notice the ppm was 1000 but its now 900… SO, I will send to the pumps insert 10% of my first addtion, like, 0.1 #1, 0.4 #2 and 0.3 #3… the ppm still under the 1000? ( we want 1100) add more 10% until the tds reflects the % what you want to increase… same for the water…
I put 1000 but its coming 1100 after some hours… dilute the solution with more 1 liter, check the tds until the TDS reach 900…
Is that what you asked me ?