Response to The age of the reagents may play a factor. If the chlorine level is really high, then the color may flash from blue to yellow instead of green to red. You can try adding a small amount of chlorine neutralizer to the sample to see if that helps

An image is worth 1,000 words! Add an image or two to your comment to help ensure it is understood accurately.



Yes, please email me exclusive discounts, swimming pool tips and helpful how to guides. This comment may be posted on a public site. Do not include: HTML, references to other retailers, pricing, personal information, or any profane, inflammatory language.