Hello, I have used Red Sea test kits for a few years now. I was having problems with testing ammonia back in Dec with a new tank I was setting up. My test kit was expired. So I purchased another test kit that expires 12/18. Well I decide to test for ammonia this weekend and its high @ .8. Instead of doing anything drastic I let it be. And tested again today. It reads 1.2. I pulled out my old API test kits and tested they came up zero. I also had a new spare Ammonia Alert badge I stuck in my sump. It is showing zero also. Now I started thinking maybe this new Red Sea kit is bad. So I tested a vial of RODI water and another of my tank water. Sure enough the RODI came up showing ammonia. Here are both tests. My question is there a time limit once opened?