Originally posted by Atriax
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When you mix your feed solution DO NOT pH your water base.....yet. Add your inputs like normal. If you have an ec/ppm meter now is the time to check your ec/ppm levels. If you've measured everything out correctly take note of the ec/ppm for future reference. Now that you've noted your EC/ppm you can pH the solution and adjust accordingly. If you're in soil typically 6.5 is where you want to land. If you're in hydro then 5.8.
Here are some availability/pH charts to help you understand how pH affects your plants. Note that one is for soil and the other is for water/hydro.
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