100 Pcs Hot Tub Testing Strips,6 in 1 Kit Pool Testing Strips and Spa Chemicals Swimming for Rapid Measurement of Residual Chlorine in Water PH Total Hardness Alkalinity for Tubs Free Bromine Ttorage

i bought them to use but find i just use the hot tub mostly without getting close never had any issue just have shower after

Really good and easy to use. Plus you do get a good amount to use.

Good value

All great

Really good test strips ,shows you everything you need and very good accuracy

Over rated

Really clear and easy to read. I love the fact they come in multiple small vacuum pouches that prevents them going bad once opened. Just make sure there aren’t 2 stuck together when you use them

These are not good test strips. Used as directed on the packaging. Third picture - strip on the left is dry, and right strip is after 15 seconds after dipping. The pH test does not change colour. I used a calibrated pH meter reading 7.4 however the strip colour was still yellow. It should've been a pinkish colour. The total chlorine on the comparison charts gives indicators between 0 - 500ppm?? It states 0ppm is ok, and the next reading it can give is 25ppm which is way too high. Total chlorine should generally be between 1-3ppm, so it's impossible to get an accurate reading using the strips The chlorine colours on the strip also do not match the colours on the comparison chart. Mine were coming out closer to a brownish green colour, rather than light green. Would not recommend as these do not work properly.