Can't trust only one Thermometer

[smokinreefer]

If you're using a heater with those suction cup temp probes...
Please be sure the probe is SECURE.

Last thing you want is the probe to come out, giving a low temp reading and the heater to stay on and on because it thinks the water is cool.

You can end up losing alot of clams and zoas that way.
Yes I'm still bitter after a decade.