Hi, I just bought a hanna ph tester and tested a mix of equal parts of soil and osmosis water, is this the good way to test the ph in soil? the ph was 5.9. so I bought a ph+ solution to raise the ph to 6.5. The weird thing is that i tested the water I use to water my plants and it's at 7.5 so I don'T know why the soil is at 5.9. My question is how do I raise the ph in my soil to 6.5 I don't want to overdose and have an alkaline ph. thanks guys.