JNW Direct Aquarium Test Strips 7 in 1, Best Kit for Accurate Water Quality Testing for Saltwater & Freshwater Aquariums and Fish Ponds, 150 Strip MEGA Pack

My fish were getting sick and a few died. So I bought this test kit.The test kit revealed that my tank was dangerously high with nitrates and low ph.I quickly did my homework and figured I had to do some water changes to lower the nitrates and include crushed shells in my filter (or tank sand) to bring up the ph.The photo is a couple days after installing the shells and after I changed a few gallons of water.I also learned that this is known as "old tank syndrome" but mostly because my tank is over stocked.I highly recommend this test strip kit.

These work as represented. I am happy with my purchase. Easy to use and read.

Follow instructions well and hold horizontally when it's time to see results. Only hold in liquid for about 3 seconds. I don't know how accurate these are, but I'd say they're still handy. The colors bleed into each other so that may be a little annoying.

I used this product for my betta fish to keep him water clean. It’s very accurate other than pH as that as slightly wrong. Overall, would probably recommend!

After reading reviews on test strips I decided on these. They tested the majority of what I needed and the reviews were decent. First, I tested all five of my aquariums and they seemed to be accurate compared to my API master test. Then I tested my tap water just for comparison. Everything there seemed to be good, other than the Ph.My tap water has a Ph ranging from 9.5 to 10.3 according to my water company. When I test my tap water with my API master kit it shows the highest possible results. On these strips, my tap only shows slightly higher than my tanks and even the results for my tanks is inaccurate.In the photo, the first strip is my tank water. It shows a Ph of 6.2 but the actual Ph is 7.4. The second strip is my tap water. It shows a Ph around 6.8 (possibly 7.2) but my actual Ph is at least 9.0. I mainly got these as a quick way to check my nitrates and that does appear to be accurate so they will serve their purpose, but you might not want to rely on them for Ph results.