I bought this Finnex Max-300 Digital Aquarium Heater Controller about a month ago and have been keeping a close eye on it. So far it’s been great! It keeps my temperature set right where I want it at 80*.
Here’s a little additional info:
*LED Heating Indicator and Current Temperature Thermometer
*Over Heating Protection +Memory
* Safely Monitors Heaters up to 300 Watts
*Not compatible with Aqueon PRO heater series.
*Heater sold separately
“Over heating heaters is a hobbyist nightmare. To protect your aquarium investment and live stock, this heater controller is a must. The digital controller maintains your heater within a safe temperature providing a healthy and stable temperature for your aquarium. Automatic shut off over heat protection will alert it’s internal sound alarm and cease the heating process. A temperature probe is included to ensure a more accurate aquarium temperature reading. The three prong power receptacle works well with other compatible heating elements equal to or less than 300 Watts. Add a controller for double heating protection. If power is interrupted a memory chip is incorporated to resume users preset temperature once power resumes. Do not use with defective heating tubes. Defective heater tubes may be drawing excess watts and in turn make the MAX 300 controller fail.”