I am wondering if this is an ok way to check ph and maybe ppm/ec in my soil until I get my soil blue lab pen? I took one cup water and 1 cup sunshine 4 mixed and let sit 10 min then strained through a coffee filter and dropped my probes into it and it read 6.2 ph and 420 ppm.... is this efficient/ or some what accurate way to check for now. and is this good for sunshine 4 growing auto's? Thanks for any and all input