What does the Aqua One 200W Glass Aquarium Heater do?
It keeps your tank water at a stable temperature by automatically turning on when it dips below your set point, then switching off when it hits target. It’s suitable for freshwater, tropical, marine, shrimp, planted, and quarantine tanks.
What tank size is this heater best for?
It’s rated for aquariums up to around 200 litres. In colder rooms or for more stable performance, using two smaller heaters or sizing up slightly can offer better coverage and redundancy.
What temperature range can I set, and is it accurate?
You can set the Aqua One 200W heater between 20°C and 34°C using the built-in dial. It has a visible display window. While it's designed to be accurate, always double-check with a separate thermometer for best results.
Can I use an external controller with this heater?
Yes—it’s not required, but a temperature controller adds an extra layer of protection, especially in tanks with sensitive or high-value livestock.
How should I install and position the heater?
Mount it fully submerged in an area with good water flow, like near your filter outlet. It can be installed vertically or horizontally—just avoid contact with glass or substrate and always use a drip loop on the power cord.
Do I need to wait before turning it on after setup or a water change?
Yes—let the heater acclimate for 15–30 minutes before powering it on to prevent cracking from thermal shock, especially if the tank water is significantly cooler.
Where should I place my thermometer?
Place your thermometer at the opposite end of the tank from the heater. This helps ensure the entire tank is reaching the correct temperature, not just the area near the heater.
Does the heater need water movement to work properly?
Yes—good circulation ensures even heating and prevents hot or cold spots. Poor flow can also cause the heater to cycle on and off more frequently than needed.
Can this heater overheat or crack?
Like all heaters, it can overheat the tank if it fails or is misused. Keep it fully submerged, don’t run it dry, avoid sudden temp swings, and never remove it from water while hot. A heater guard is also smart if you have turtles or large fish.
What should I do if the heater isn’t heating?
Check that it’s plugged in, fully submerged, and not set below the current water temp. If the indicator light is on but the tank isn’t warming, verify temp with a second thermometer and ensure there’s enough water flow.
Does the Aqua One 200W heater shut off automatically?
Yes—it automatically turns off when it reaches your set temperature and turns back on when the water cools. An indicator light shows when it’s actively heating.
How long is the heater and its power cord?
The heater is approximately 27.5 cm long with a 1.8-metre power cord, giving you flexibility in placement. Just ensure a proper drip loop to protect your socket from moisture.
How do I clean and maintain the heater?
Unplug and let it cool before cleaning. Wipe with a soft cloth or sponge. If there's mineral buildup, a gentle soak in diluted vinegar works—rinse thoroughly before returning it to the tank. Check suction cups periodically.
What’s the warranty on this heater?
The Aqua One 200W Glass Heater comes with a 2-year warranty, and some listings may offer up to 3 years depending on supplier. Keep your receipt for any warranty claims.
What’s the most common mistake people make with aquarium heaters?
Turning it on while dry or removing it while hot. These two mistakes cause most heater failures. Always let it acclimate before switching on and allow it to cool before removal.
