I brought a sample to test for metals, it was iron .01. They told me my FC was 5 ppm, but i tested it just before going there and i got 11 ppm, came home and tested again it was 11 ppm, are there any signs of chemicals going bad, they 1 year old, store inside air conditioner home in tge dark at 77 deg. I found no date on bottle. All Taylor chemicals. Thanks
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