Either they are, crap, cheap or defective? Don't wasted money.
I think the strips are defective. I was using a water test strip that appeared quite accurate on saliva, sink water, RO, bottled water, & urine. I got these just to test saliva and our water.<br /><br />As soon as you dip the strip into liquid, the top patch turns green, then just dissolves away (falls away) leaving the patch yellow or almost colorless, no matter if I test soft, hard, RO, urine, coffee, saliva. It reads the SAME. Where the cheaper pool water strips read more accurate and give different readings.<br /><br />These are crap, cheap, or defective.
Rating: 1 stars