Digital Thermometer

[Saltysteve]

Well, I sure liked my digital thermometer but I have discovered a problem. It is out by 4 degrees +. For some reason I just decided to buy myself an old school thermometer. I lowered the temp to what I thought was 78 from 82 (which would have been 86 (more on a hot day) but the new meter says I'm still 82. OMG

I lowered the heat and now the new meter is reading 78!
Geeeee, I wonder why my tank was green

You'd think I would have clued in earlier!

Food for thought!