Check your water temperature every day if you can. To do so is very simple – all you need is a thermometer, which you can put into the water for a minute, and remove it to read the temperature.
You can also get thermometers that float in the water or attach to the side of your fish tank.
To know whether your water temperature is at a comfortable level, check out Do I Need a Heater for My System?
This information is provided by Sweet Water Foundation.
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