Perfect for aquariums, wine making, swimming pools, spa's hydroponic's , schools & colleges to name a few, Great price Digital Ph Tester Pen MeterThe PH-009 Ph tester will meet all your Ph requirementsPerfect for aquariums, wine making, swimming pools, spa'shydroponic's , schools & colleges to name a few,Great price,very accurate,speedy deliveryFeatures:* Range 0.0-14.0ph* Resolution 0.1ph* ...