Posted by: bump1 I really like it as well. I was thinking on waiting but I might go ahead and get one. My hinges broke on my refractometer. I am wondering why use the cup and not just stick it in your tank? said:
Read a hobbyist review today and he got a different reading by sticking it in the tank vs using the cup. He compared it against a milwaukee digital unit and they were usually the same or .001 different. He did say the icecap was reading a different temp than his other gauges but was within the +/- that was quoted in the manual.