Title: Loved this heater...while it worked.
Product review: Purchased this heater for a cichlid tank, set it up to keep the water temperature at about 79-80 degrees. Heater is very nice looking and the control knob seems to work well. The indicator light was a nice feature, flashing slow when the water temperature was very low, solid when heating and flashing fast if the water was too warm. Kept the temperature very stable for 3 weeks, at which time it became erratic, heating and then instantly flashing fast that the tank was too hot. Then it would shut off, flash that the tank was too cold, come back on, etc. This would all take place in a span of about 10 minutes. Obviously they have a problem with the thermostat as I have now read other sites with comments that are very similar. Warranty is a joke, as you have to ship it back at your expense along with $10 to cover their return shipping. I threw it out and replaced it with a Hydor in-line heater. No more Rena for me.
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