Expired test kit

[DKoKoMan]

IMO I would just get a new test kit and go from there. Test kits already aren't the most accurate so I wouldn't want to compromise with an expired kit and have the values even more off. This is very important whe it comes to dosing with false readings... don't want to risk a tank crash.

That being said I could see them still being somewhat accurate but I would not trust the reliability and would have a hard now sleeping at night!