Re: Test Kits
The test kit should be absolutely fine for this season. Since the kit was sealed, there was no light or moisture that would get in to degrade the chemicals. The only problem would be if they left the kit out in heat, but it's probably been stored in a warehouse, so it's probably OK.
The DPD powder is probably the most sensitive chemical found in the kit and this thread talks about experiments made by forum members who found that it lasts quite a while (more than one season). If you want to extend the life of your chemicals, you can refrigerate them as cooler temperatures (and dryer air) slow down whatever decomposition that could occur, but just keeping the kit in your home at "comfortable" temperatures will be fine for at least one year and probably at least two. I would not be surprised if most forum members only change their chemicals as they get used up and generally don't have problems.
Richard
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