Hey, I have been noticing that mypH may be incorrect, because i have deficiencies even though i am feeding regularly. What is the best way to test the pH? Is it to test the runoff or to get a soil tester that has two metal prongs that you stick in the soil while the device gives you a reading of the pH? I also have those strips with multi colors on them, they came with my hot tub. they are the kind that you put in the water for ten seconds and it shows the PH. would those work too? thx GC