I got a general hydroponics pH solution and I want to test my soil and runoff on my plants. How do you guys do it? I tried doing it on my own. I couldn’t find any information on the internet pertaining to testing pH of soil and I couldn’t get it to be clear enough to really see the color reaction of the solution… Appreciate you guys…
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Read this thread and it will help you.
In my opinion I would ditch the solution and get a pH meter like blue lab, Apera, etc.
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Is the GH solution you’re referring to the calibration solution, if so that’s for calibrating your PH pen. 2 methods to testing medium PH. 1st is a simple run off test after watering or feeding catch a sample that runs out the bottom of the pot and test the PH. 2nd method and more accurate is a slurry test, this method is a little evasive but you take a sample down near the root zone and mix equal parts of soil to distilled water, stir and let that rest for an hour or so and strain through a coffee filter and test 
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Could you post a picture of what you have
General Hydroponics pH Test Indicator, 1-Ounce https://a.co/d/h4nIX5M
Not sure how you could use that in a slurry test need to get yourself a PH pen