KoiMedic Salinity Meter   ECO- Pal Digital pH Meter   AQUARIUM PHARMACEUTICAL TEST KITS   ECO- Pal  Digital pH Meter  The ECO pH Meter measures pH, one of the more important control parameters in Koi ponds.   Having a rugged, reliable and portable tester  is indispensable to Koi hobbyists on the move.                 Price  Order  $59.95 Free Shipping