16 in 1 Water Test: The test strips can be used for testing total alkalinity,pH,hardness,residual chlorine,total chlorine,nitrite and other projects,and it features the water quick test,which provides results in a matter of seconds.Practical in Use: Swimming pool test strips are suitable for drinking water,aquarium,fish tank,swimming pool and spa,industrial water,pond,hot spring water testing. Practical in Use: Swimming pool test strips are suitable for drinking water,aquarium,fish tank,swimming pool and spa,industrial water,pond,hot spring water testing. Fine Quality: The high-quality water test strips with precise colour coordination and high sensitivity,and the drinking water test strips can be used for testing water quality. Easy to Use: Dip the drinking water test paper into the water for 2 seconds,hold it in the air for about 1min,then adjust the color of the bottle back to get the reading. Portable Design: The box contains 100 pieces of test strips,and the water quality should be tested weekly,and the drinking water test strips are to use for beginners.