i bought a new ph meter pen for about 25 bux this is the link: http://www.ebay.ca/itm/NEW-DIGITAL-PH-METER-FISH-MARINE-AQUARIUM-HYDROPONICS-/350295477812?pt=LH_DefaultDomain_0&hash=item518f3cce34&clk_rvr_id=306451819341
my issue is, it comes with 2 buffer solutions for calibration that i dont...