- Oct 10, 2014
- Reaction score
- Pensacola, Florida
- Hardiness Zone
Thought so. How long have you had them?Strips.
Strips are good for ball park readings. They are not very accurate and will lose testing integrity with age, especially if in humid conditions.
Invest in an API Master Test kit. These are liquid reagent tests and are much more accurate with a much longer shelf life.