[QUOTE="Jetta, post: 358180, member: 9352"]Strips.[/QUOTE]\n\nThought so. How long have you had them? \nStrips are good for ball park readings. They are not very accurate and will lose testing integrity with age, especially if in humid conditions.\nInvest in an API Master Test kit. These are liquid reagent tests and are much more accurate with a much longer shelf life.