Light years
...Please note that the Edge heater will maintain the water temperature within 2-3C of the ambient room temperature. If the room is very cold it may appear that the heater is not working it is but may not be able to reach the desired temperature within the tank (particularly if the light is on).
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Light years
...It will trap fine debris & small particles ...
It is always useful to be able to monitor the temperature of your aquarium & this Fluval Edge Digital Thermometer that attaches to the outside of the glass will instantly tell you what the temperature is. ideal to be used with the Fluval Edge set of aquariums.