Review on 🐠 Comprehensive 7-Way Aquarium Test Strips: 100 Strips Testing Kit for pH, Alkalinity, Nitrite, Nitrate, Chlorine, Carbonate, and Hardness (KH & GH) in Freshwater, Saltwater, and Pond Fish Tanks by Tyler Turner

I test the water in my 2 aquariums at least 2 times a week. It's good to have a large supply on hand. This is the third brand I've tested and when I test them alongside other strips they are just as accurate. I also tested them at Petco with full water - and they were accurate. If you are serious about your aquarium, you need to know the water parameters. This is a good tool. They have an expiry date - check the date and keep them tightly closed.