Simple and fast
The Tetra test strips were simplicity itself. A neat little tube of 25 strips with clear instructions and suggestions on the chart of which values would mean I need to change the water in my tank. The separate ammonia test strip set was just as simple and easy to use – a vast improvement on waiting 5, 10 or 20 minutes for colours to develop having faffed around with drops of fluid from several bottles. I tested these strips against the dropper bottles and the results were confluent. The Tetra version were smaller with a container that was much easier to open, which was nice.