Hanna Checkers

[evoreefer11]

If I have Hanna checkers but they have been sitting for about 7-9 months do they ever expire?? I know the solutions have to be replaced but what about the checker in its self?? Does it ever expeire or go bad??

 

[Cali4ya]

hanna phospate checker does have an expiration on the packet.

 

[evoreefer11]

But the checker In it self will still work as long as I buy the packages right??