- Reaction score
So I know that API test kit reagaents have a 2-4 year life span in the bottle, but are there storage methods that can dictate the longevity of the chemicals? My bottles (specifically pH and nitrate) say 2022, but my reagents already have signs of expiration according to my results I’m getting. Over the winter I left my test kits in my basement in fairly cold temp for a while. Could that decrease the life of the chemicals!?