Replacing Hanna checkers

[merfish101]

I purchased 3 Hanna checkers in 2017. Other than the obvious (like, if one was broken) is there a need to replace them with newer ones?

 

[vetteguy53081]

I purchased 3 Hanna checkers in 2017. Other than the obvious (like, if one was broken) is there a need to replace them with newer ones?

No- just get new reagents.
If the vials show scratches- replace those too

 

[merfish101]

Thanks