Finnex HC810-M Digital Controller

This is by far the best, everybody should by one if you want exact temp control, can't say enough good things about this product. (Posted on 2/5/2017)

i would recommend this to anyone. great controller and keeps very accurate temp. will buy another for backup protection. (Posted on 2/3/2017)

Good price Very reliable as I have many of this brand (Posted on 12/11/2016)

I added 2 of these controllers with 800w finnex titanium heaters in the sump of my 500 gallon freshwater and it stays within 2 degrees of the setting clear to the bottom of the tank.
what a joy to own. (Posted on 8/24/2016)

This is the 2 degree standard of heater controllers. Meaning whatever you set it has to drop a degree to heat up. Then when it does it heats over the set point by one degree to stop. So 78 set would be 77 to turn on and 79 to turn off. I was using an elaborate controller that did a lot of other things but 3 years in either the heater prob died or the controller. So thought would go basic again and this handles two heaters on my 180 reef. Seems well built and easy to program. Dual relays for for over temp safety with alarms and a memory that if you lose power it remembers the settings you had. (Posted on 2/29/2016)

Excellent heater and controller. Really gets the job done. Like the alarm feature if temperature is too high or too low. My only complaint is that when it is unplugged, all of the settings need to be re-set. Have used many heaters and controllers, and this is one of the best." (Posted on 1/25/2014)