JNW Direct Pool & Spa Test Strips 6 in 1, Best Kit for Accurate Water Quality Testing for Home Swimming Pools, 150 Strip MEGA Pack

The Chlorine tests don't seem to work, at all. I was comparing these to a liquid reagent test kit I have just for Chlorine and pH.Chlorine total and PPM aren't registering at all when chlorine is actually at 5ppm. The bromine square seems to actually seep into the free chlorine square (turning it yellow). Other than that- both squares just stay slightly off-white "0".The Alkaline measure seems to be a bit low too, especially if you only let the strip set for the 30 seconds the instructions say too. It gets darker over time, but after 30 seconds is much lower than it should be. For example- 6.4 when it should be reading 7.5. If I let the strip sit for a couple of minutes- it does seem to darken to the correct pH, but it isn't accurate using the instructions provided.Even after 5 minutes- the Total Chlorine still says "0", and Free Chlorine would show "0" if it didn't pick up the yellow tinge from the adjacent Bromine spot.Since the two most-obvious tests (Chlorine and pH) seem dubious, I doubt the accuracy of the rest. I'm returning...

After using these for almost a year and never able to get my pool water CHLORINE were I wanted and arguing with pinch a penny I decided to buy the liquid test kit, I have been over chlorinating my pool for almost a year, these are useless, a good number of them loose the test material for some of the tests once dunked in water, the only true reading you get is water hardness, all other tests show nothing close to real value, I can't believe I wasted my time with these for over a year, DO NOT BUY THESE!!!

Calcium Total Hardness strip is very inaccurate. Other strips seem to correlate well. I added more and more Calcium Hardness Increaser trying to bring Total Hardness up to 150-200 range in our small spa. The strips wouldn't register above 50. I checked TH level with our usual brand of test strip and it read 1000+. I had to dump out the water and start fresh or we might have had some serious scaling problems.

They are not accurate. It showed 0 bromine (when bromine levels was ideal in my spa, my husband measured it with professional equipment), hard water, when our water is actually slightly too soft, and showed that I have enough chlorine on bromine system in my spa.

This easy to read 7 way test strip is the best priced, most comprehensive test kit in a strip that I have ever purchased. The e-book available is also a valuable learning tool for taking care of your pool. Will buy this one from now on.

The test strips does what it supposed to do. Accurate and fast readings. The price is very reasonable, in fact, cheaper than the other brands. Further, am very impressed on how fast the shipment and delivery was. The merchandise arrived earlier than the promised delivery date. Will definitely do business with them again, and use their products.

Bought this to test our spa water and it works pretty well. I am still having troubles telling the shades of colors apart, but that's been my experience for all test strips I've used. DO NOT SHAKE the strip; our spa maintenance guy told us to do this, but it really throws the colors off, especially the hardness color. Just dip, and measure!

This thing doesn’t work. Doesn’t read anything accurately. I accidentally dropped too much PH increase and shock and as you can see it is showing very low PH and no bromine when in fact bromine is too high now. I still had some strips that came in the tester kit and those seem to show it more accurately based on my actions and what I put in the water.