Good but too big for tank i think,
Verified Purchase(What is this?)
This review is from: Hydor Theo Aquarium Heater Thermostat, 300 W (Misc.)
Heater was good but unfortunately it kept cycling on and of every minute. I have a feeling this was because there was not enough flow around the heater and therefore the water around the heater was warm enough to cause the heater to think the water has reached set temp.