Just starting a new tank and trying to get everything dialed in. My Apex Jr. Temp reads 77.2, my floating thermometer reads 75, my digital hand held probe read 79.3. I know it ain't 79 degree,s so let's ax that one. I am leaning towards believing the Apex more than any of the others, but want to learn from anyone out there who has more experience with APEX probes and can give me any more info. on their accuracy. Can someone recommend an accurate floating thermometer? My LFS had only stick on strip thermometers and one that I had already read bad reviews on.