OK so as the title states I wish to get the most accurate readings as possible from my meter. I ordered some Ph 7 solution- http://www.amazon.com/General-Hydroponics-7-0-Calibration-Solution/product-reviews/B001D0CKYK/ref=dp_top_cm_cr_acr_txt?ie=UTF8&showViewpoints=1 to be exact, and it says on...