I've had 2 eheim jagers quit, so I wouldn't recommend them. I had a 200 watt last 6 months and a 150 watt last only 3 months. I'm still using a 300 watt Jager controlled by a ranco temperature controller. I've been using the Ranco, since I set the tank up, so hopefully the heater last. The ones that quit the heating indicator light lit up, but they didn't heat. I actually thought the indicator light on a jager was a port hole to see the glow of the heating element. You'd think if the element was glowing it was heating, so I don't know what to think. I've been using a few aqueon pro heaters with no issues so far. I run all my heaters with external temperature controllers now, since the internal thermostat is unreliable.