While we city folk in Melbourne endure the 15th consecutive day of over 30c, I have been frantically trying to keep my aquarium fish tank water within the recommended 26-27c. This I have to say has been a challenge but after a bit of research, trial and error (yes we had a sad loss within my fish community) I can recommend the following tips and advice.

Location, location, location

The correct location of your aquarium within the home can help you to avoid the majority of problems with the water temperature rising over summer. A location that provides a constant temperature and is away from direct sunlight is a must. In addition, try to avoid a location that is near any heated sources such as a hot water service or any large electrical appliances (I.e. anything that generates heat). It is also worth noting that locating your fish tank near a draft / entrance way is not a good idea; this often runs into the opposite problem of keeping your water from getting too cold in winter.

The right control

It may sound obvious, but it is a good idea to check the condition of your aquarium heater at least once a year to ensure that it is operating correctly. A heater with an automatic thermostat is also a must. This will ensure that the heater will turn it self on/off to maintain a constant temperature range.

Fighting the heat

If despite your best efforts your aquarium water has got too warm, the first thing I would recommend is to turn off the aquarium light off as it will be simply generating additional heat. Secondly, take the top cover off the aquarium to allow any excess heat to disperse from the tank (and if you have a cat or are worried about your fish escaping, remember to put some netting over the top of the aquarium in replace of the cover). If the water is still too warm, the next step is to either replace some of the aquarium water with cool (aquarium ready) water or attempt to cool the existing water down by way of a fan. As for me, I would recommend using the fan before changing water. It is most likely that you fish are stressed with the increased water temperature so adding to that stress by replacing the water should be avoided. In any case, you will be surprised how effective a fan can be in reducing the surface temperature, particularly if the cover of the aquarium is off and the air can break the surface of the water.

Finally

It is also recommended that you feed your fish less during the warmer months. The warmer water will putrefy the any uneaten food more rapidly, creating more waste and therefore leading to less-oxygen rich water.

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