So I just upgraded my nitrate test kit (from Amazon) to the red sea pro and it expires in august of this year. It was only $35, which is a drop in the bucket in this hobby, but I feel like I should expect at least a year of use out of a decent test kit. So what do I do? Complain and return, or grin and bare it? Also how definite are these “expirations”? I’ve heard that some people use their chemicals well past their expirations with great succes.