Absolutely agree. I've now resorted to the inexpensive pH drops to check the pH of my water, based on the same experiences as you. One bottle of solution lasts many hundreds of tests and it's so quick, cheap and foolproof.
I run organic but have found that because the pH of my water is so high (over 8.0) I still need to pH it down to about 6 - 6.5 for best results. I use regular "pH Down" which is simply phosphoric acid. If I don't pH the water, I find I still get deficiencies, and they usually show up around week 3 of flower, especially phosphorous deficiency. Which makes sense if you look at the following chart:
View Image
Now I'm just guessing here, but from what I can tell you may be dealing with a similar issue. Note the information for the pH in this report on the city of Chicago water:
https://www.chicago.gov/content/dam...erQltyResultsNRpts/ccReports/CCA-2019-1-2.pdf
So you can see it is up at around the 8.0 mark at both treatment plants.
Referring back to the pH and nutrient diagram, this could potentially cause you some issues with phosphorus and magnesium, which if you Google "phosphorus deficiency cannabis" and "magnesium deficiency cannabis" look similar to some of the fan leaves on your Panama. Multiple deficiencies are always trickier to identify though.
Ultimately I wouldn't stress too much, the buds are still looking well-formed, and you get the fun of being able to incrementally make adjustments to fine-tune your grow, which in my opinion is what keeps it interesting and challenging.
Range, thanks a million for this information. I think that’s exactly what this issue is. I’ve known my water PH was rather high for quite awhile now that’s why I switched to RO but that filter only last four months! Lol.
I think I’ll get some drops and do as your suggesting, it will be the easiest route and should be a simple fix