I've been using this kit for 2 months and all seems easy and accurate. My local fish shop has professional testing equipment and results from this kit are similar. It's easy to test, instructions are okay, and only takes about 15 minutes to do 5 tests.Reason for 4 stars is the test tube situation. First, there are 5 tests but only 4 tubes are included. Arguably, one of the pH tests can be ignored depending on your aquarium needs, yet that's not stated in the instructions so it isn't clear that only 4 tests are needed. Second, the tubes are super delicate. Like REALLY delicate so that it's easy to crush them in your hands while trying to remove the very snug caps. Why are the caps so hard to get off? Worse, the seats in the plastic housing for securing the tubes are prone to breaking the tubes just by inserting them. The result for me is inside of 2 months I've lost 2 tubes to bad design.
Rating:
[4 of 5 Stars!]