To set, just choose the heat temp you want by pushing the button. It scrolls through your choices and once you come to the temp, just stop pushing. Shows current and set temps in red.

Straight forward heater and controller. Easy to see, even under bright lights. Installed it a little bit ago and so far so good.

Two suction cups to keep the heater in place. Holding accurate temp and staying put horizontally on the back wall of the tank. Holds temp in aquarium nicely.

Heats the water up one degree in about 10 minutes and holds 79 in a 68 degree room easily. My betta now enjoys a consistent, warmer water temperature that has visibly improved his overall well-being. My turtle loves soaking in his pool and really appr...  Read More

The heater is easy to install and operate.