Description

OASE HeatUp Aquarium Heater

When you’re looking for an aquarium heater that delivers precise, dependable performance for both freshwater and marine setups, the OASE HeatUp Aquarium Heater stands out as an exceptional choice. Designed with advanced bi-metal technology to ensure uniform temperature levels, this heater helps maintain a stable environment so your aquatic pets thrive and flourish. 

From the moment you install it, you’ll appreciate the thoughtful build of this aquarium heater: a double-insulated quartz glass tube for durability and safety, a secondary adjustment knob for fine-tuning within ±2°F, and an automated heating system complete with thermal shutoff.
You’ll immediately benefit because the aquarium heater allows you to:

• Achieve consistent temperatures across your tank, avoiding hot or cold spots thanks to the bi-metal monitoring system.

• Fine-adjust the temperature easily, ensuring delicate fish and plants are kept at their ideal range.

• Install quickly using the included holder and suction cups — done in minutes and secured in place. 

• Use in both freshwater and marine aquariums without compromise. 

Whether your tank is modest or large, the OASE HeatUp range covers you: from 25 W (for about 10 gallons) through to 400 W (for ~100+ gallons) versions. 
Mount it discreetly or integrate into your filtration set-up (in recommended models), and let the aquarium heater quietly maintain optimal temperature so you can focus on enjoying your aquatic ecosystem, not the gear.

Why choose this aquarium heater?
Built in Italy and backed by German engineering, this heater carries UL certification and a 3-year warranty, giving you confidence in its safety and longevity. 
Many hobbyists report how this heater provides calm, consistent performance even when ambient room temperatures fluctuate. Because fish health often depends on stable water temperature, choosing this aquarium heater helps you create a secure environment for your community fish, planted aquarium or marine reef.

Usage & installation tips:
Install the aquarium heater vertically in a low-flow area of the tank or in your filter chamber if compatible. Allow the heater to fully submerge before powering on. Set your desired target temperature, fine-adjust using the secondary knob, then monitor for the first few hours. The control light indicates heating activity. With a robust quartz glass tube, you’ll enjoy safe operation — but always ensure fins or decorations aren’t directly touching the heater surface.
For best results, pair this aquarium heater with your regular water testing routine, and afford a few hours to stabilize after first switch-on before introducing sensitive livestock.

In summary:
If you’re seeking an aquarium heater offering premium build quality, accurate temperature control, and the flexibility to suit tanks from smaller setups to large aquariums — the OASE HeatUp is a top-tier choice. Keep your fish comfortable, plants flourishing, and aquarium environment stable. Add this aquarium heater to your aquatic toolkit today.

• Accurate temperature adjustments – Temperature scale can be adjusted between 66°F – 90°F. A secondary control knob allows for precise readjustment of the temperature within +/- 2°F.

• Uniform temperature levels – Temperature levels are monitored and controlled by bi-metal technology for automated heating. Includes a thermal shutoff switch for added protection.

• Durable – High quality, double insulated quartz glass. Created to withstand greater temperature fluctuations than glass.

• Filter integration capabilities – Integrate HeatUp 50-300 into OASE filters to combine filtration and heating into one location

• What’s in the Box – Aquarium heater, holder with suction cups and integrated post calibration tool, and power cord

• Heating function is displayed via activated control light

• Easy to install with the use of the included holder with suction cups

• Made in Italy, backed by German engineering

• Fresh and marine water compatible

• UL certified

• 3 year warranty

Order your OASE HeatUp Aquarium Heater now and experience dependable temperature control for your freshwater or marine tank — so you can enjoy your aquatic world with confidence!