The 4 in 1 Test kit for swimming pools and hot tubs.
The 4 in 1 Test Kit is a step up from the domestic kits and uses liquid reagents to achieve an accurate test result.
One very useful feature of this test kit is the acid demand test. In situations where your swimming pool water is about pH 7.8, performing an acid demand test will you how much needs to be added to your pool water to restore the recommended pH level.
The 4 in 1 Test Kit comes with 4 solutions, DPD No 1, DPD No 3 and Phenol Red Test Tablets.