Preparing Your Desktop Aquarium for Summer: Tips to Beat the Heat
- PNW Custom
- Jun 3, 2025
- 2 min read
As temperatures rise, your desktop aquarium can start to feel the effects of summer. With a few simple precautions, it's easy to keep your reef or freshwater aquarium stable and thriving throughout the hottest months of the year.
1. Monitor Your Water Temperature Closely
Small aquariums can warm up quickly, especially when exposed to direct sunlight, warm rooms, or equipment such as pumps and lights running throughout the day.
For most reef aquariums, we recommend maintaining temperatures between 75–80°F. While brief fluctuations are normal, temperatures consistently above 84°F can place stress on corals, fish, shrimp, and other inhabitants.
Tip: Using a reliable temperature probe allows you to track daily temperature swings and catch potential issues before they become a problem.
2. Add a Desktop Fan Cooling Kit
One of the simplest and most effective ways to combat summer heat is with a dedicated cooling fan.
Our Desktop Fan Cooling Kit uses evaporative cooling by directing airflow across the water surface in your sump. As water evaporates, excess heat is carried away, helping maintain a more stable aquarium temperature.
Depending on room conditions, the Cooling Kit can reduce water temperatures by up to 6°F, making it an excellent solution for warm climates, home offices, classrooms, and rooms without consistent air conditioning.
Additional benefits include:
Compact, low-profile design
Quiet operation
USB-powered for flexible installation
Compatible with our Micro Reef Controller
3. Move Your Tank Away from Windows and Heat Sources
Direct sunlight can dramatically increase water temperatures throughout the day, even if the room feels comfortable. A cooler location can significantly reduce temperature swings and lessen the need for additional cooling.
To help keep temperatures stable:
Avoid placing aquariums in direct sunlight
Keep tanks away from south- and west-facing windows when possible
Close blinds or curtains during the hottest parts of the day
Maintain a comfortable room temperature whenever possible
3. Take Control with the Micro Reef Controller
For reefers who want even more control and peace of mind during the summer months, the new Micro Reef Controller adds an extra layer of temperature monitoring and control to your desktop aquarium.
With the latest version, the controller now includes a dedicated fan port, allowing you to connect your Desktop Fan Cooling Kit directly to the system. You can monitor your aquarium's temperature remotely and manually turn your heater or cooling fan on and off from anywhere with an internet connection.
We're also excited to share that an upcoming software update will introduce automatic temperature management. Using the controller's temperature sensor, the system will automatically activate your heater or cooling fan based on your target temperature range, helping maintain a more stable environment with less manual intervention.
Keep Your Tank Cool All Summer Long
Summer doesn't have to be stressful for you or your aquarium. By monitoring temperatures, reducing environmental heat sources, and adding a Desktop Tank Cooling Kit when needed, you can keep your reef or freshwater aquarium comfortable and stable throughout the season.
A little preparation now can help prevent heat-related issues later, allowing you to spend more time enjoying your tank and less time worrying about the weather.
