Get a TDS/PPM tester. TDS is Total Distilled Solids and PPM is Parts Per Million. They are the same thing. It was a bit confusing to me. I have the Apera TDS20 which was recommended by many here.
To test you just take a reading of the PPM going in when watering. Then water enough to get runoff and you take a reading of that. The pattern will manifest itself over time. It will also vary based on the plants life stage.
@SmokingWolverine is there instructions for that spreadsheet. It looks like a well designed tracker. Some of it I can see right away but there are a few things I don’t understand like the blue squares. The visual stuff sticks out to me so that was my first question. I downloaded it and saved it to my HDD.
No, I sort have been building as I go, if you download the original Gantt Spreadsheet it had some instruction, I built formulas in for the dates. The rest is just color coding for visual affect. The percentage is a manual input for the task, which is then auto calculated in the remaining time.
@SmokingWolverine thank you. If I get stuck I will ask. Let me fool around with my copy. I used to be pretty good at spreadsheets.
I am well into a grow but this could provide another help in my next grow as it seems to be more regimented type of grow than my current soil grow. Thanks again.