MDC water quality test strip 7-in-1 seawater and freshwater pool SPA aquarium and fish pond precision testCategory: Water quality test paper, otherCertification: FDA, CE, ISOMaterial: PETTest time: 60sAdvantages: ability to resist VC interferenceTest items: PH, total alkali, nitrite, residual chlorine, total chlorine, hardness, bromineScope of application: suitable for drinking water, aquarium, swimming pool and spa, industrial water, pond, hot spring water1.Please allow 0-1cm errors due to manual measurement.2.Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.3.If you have any questions about the product, please contact us, we will patiently answer for you!Specifications:Name: MDC water quality test paper 7 in 1 seawater and freshwater swimming pool SPA aquarium and fish pond precision testSize: 15*5*5cmWeight: about 85 gramsPackage Included:1*ph test paper