The one we have now could have a couple additions IMO (sorry but I missed the last thread about this)-

water: source/ph/ppm, and a separate question for the water ph/ppm with all additives, before feeding. Then the run-off ph.

Also what type of ph/ppm meter or strips, and the EC/ppm conversion that you are using.

Also with the soil, you should state whether it has nutrients in it already or not, maybe N-P-K values for the soil?

I'm not much of a troubleshooter, but these seem to get asked... Good of you to bring this up again, Shake :greenthumb: