Welcome to our store clearance sale 15-in-1 Pool Test Paper 100 Pieces Of PH Pool Test Paper Swimming Pool Fish Tank Features: 15-in-1 upgrade: Our test provides the most extensive parameters on the market PH residual chlorine total chlorine hardness total alkali copper iron lead nitrate nitrite carbonate fluorine bromine Iodine cyanuric acid. Easy to use: It is also very simple for new users just soak a piece of test paper in water for about 2-5 seconds take it out and lay it flat and compare it with the color of the card after 30 seconds. High-quality fiber paper that provides immediate and reliable results. Convenient storage: 100 water quality test strips are packed in a plastic bottle which guarantees that the test strips can be stored for 1 year. After use please close the lid in time to avoid contact with less moisture and cause the test paper to fail. Economical and fast: The quality of swimming pool water must be tested every week. Our test strips include 100 swimming pool test strips which can be used once at a time and can be used 100 times for a long time. It also saves time and is easy to use. Wide range of applications: These test papers are widely used in drinking water swimming pools spas hot springs ponds aquariums etc. You should test the swimming pool and spa at least twice a week to monitor the water quality regularly! The package contains: 1x15 in 1ph test paper