Review on Copper Test Kit: Accurate 90-Test Aquarium Water Testing with API by Susan Park

The copper tester was delivered on time and was exactly the product pictured. Unfortunately, the entire test (including test solution, instructions, and vial) was sent in a flat-rate envelope. Because of this, the test was crushed during transportation and the glass vial broke. I have another test tube at home from the same manufacturer, but whoever doesn't have it would fail the test. The test itself is the best copper test you can get.