--- product_id: 162607429 title: "OASE Indoor Aquatics HeatUp 300 Watt Aquarium Heater, Clear" brand: "oase" price: "€ 4.67" currency: EUR in_stock: false url: https://www.desertcart.hr/products/162607429-oase-indoor-aquatics-heatup-300-watt-aquarium-heater-clear store_origin: HR region: Croatia --- # 300W powerful heating adjustable ±2°F calibration bi-metal tech for stable temp OASE Indoor Aquatics HeatUp 300 Watt Aquarium Heater, Clear **Brand:** oase **Price:** € 4.67 **Availability:** ❌ Out of Stock ## Summary > 🔥 Keep your aquarium perfectly cozy — because your fish deserve the best vibe! ## Quick Answers - **What is this?** OASE Indoor Aquatics HeatUp 300 Watt Aquarium Heater, Clear by oase - **How much does it cost?** € 4.67 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/162607429-oase-indoor-aquatics-heatup-300-watt-aquarium-heater-clear) ## Best For - oase enthusiasts ## Why This Product - Trusted oase brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Robust & Safe Design:** Double insulated quartz glass withstands temperature fluctuations and is fully submersible with secure suction mounting. - • **Seamless Integration:** Fits effortlessly into FiltoSmart 300 or BioMaster 600 filters, eliminating clutter and maximizing tank aesthetics. - • **Versatile Compatibility:** Ideal for freshwater and saltwater tanks up to 80 gallons, supporting diverse aquatic lifestyles. - • **Energy Efficient & Reliable:** German-engineered, Italian-made heater backed by a 3-year warranty for long-lasting, worry-free performance. - • **Precision Temperature Control:** Patented bi-metal technology ensures uniform heating with ±2°F accuracy for a perfectly stable aquatic environment. ## Overview The Indoor Aquatics HeatUp 300 Watt Aquarium Heater delivers precise, uniform heating for tanks up to 80 gallons using patented bi-metal technology. Its durable quartz glass construction is fully submersible and designed for both fresh and saltwater use. Featuring adjustable temperature control with ±2°F calibration, it integrates seamlessly with Oase filtration systems to reduce tank clutter. Engineered in Germany and made in Italy, this energy-efficient heater comes with a 3-year warranty, ensuring reliable, safe, and consistent aquatic warmth. ## Description The HeatUp line of aquarium heaters are a reliable way of creating and maintaining uniform temperature levels for your freshwater or marine aquarium environment. The robust double insulated quartz glass tube provides additional safety for aquarium use and is able to withstand greater temperature fluctuations than glass. The HeatUp temperature scale can be adjusted between 66°F - 90°F. The control system has a patented secondary knob for accurate readjustment of the temperature (+/- 2°F) and can be adjusted using the included post calibration tool. Temperature levels are monitored and controlled by bi-metal technology for automated heating with a thermal shutoff switch for added protection. Additionally, the heating function is displayed via the activated control light. Integrate this heater into the FiltoSmart 300 or BioMaster 600 to combine filtration and heating into one location. Use the ThermoFit FiltoSmart 300 (not included, model number 48567) to secure the heater into the FiltoSmart 300 filter. Integrating the heater reduces the amount of additional equipment seen in the aquarium. The optimal aquarium size for this heater is 80 gallons. The included holder with suction cups to install the heater to the side of the aquarium. Designed using German engineering and manufactured in Italy, this energy efficient heater is protected with a 3 year warranty. ## Features - The Oase HeatUp 300 Watt Aquarium Heater features uniform temperature level thanks to the patented bi-metal technology - 300 Watts. Recommended for tanks up to 80 gallons. - Glass construction. Fully submersible. Suction cups and bracket for securing to the aquarium. - Adjustable temperature control. The heating function is displayed via the activated control light. For use in fresh and saltwater aquariums.14.6" long. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07LBYKSHQ | | ASIN | B07LBYKSHQ | | Best Sellers Rank | #181,497 in Pet Supplies ( See Top 100 in Pet Supplies ) #310 in Aquarium Heaters | | Brand Name | OASE | | Color | Clear | | Customer Reviews | 4.3 4.3 out of 5 stars (100) | | Date First Available | December 13, 2018 | | Global Trade Identification Number | 00706759338059 | | Included Components | Item | | Item Length | 14 inches | | Item Type Name | 300 Watt Aquarium Heater | | Item Weight | 0.32 kg | | Item model number | 33805 | | Manufacturer | Oase | | Manufacturer | Oase | | Material Type | glass | | Model Number | 33805 | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | 33805 | | Product Dimensions | 3.35 x 2.17 x 15.35 inches; 11.29 ounces | | UPC | 706759338059 | | Unit Count | 1 Count | | Warranty Description | 3 year warranty | | Wattage | 300 watts | ## Product Details - **Brand:** OASE - **Color:** Clear - **Item Length:** 14 inches - **Material:** glass - **Wattage:** 300 watts ## Images ![OASE Indoor Aquatics HeatUp 300 Watt Aquarium Heater, Clear - Image 1](https://m.media-amazon.com/images/I/613mAyzdhAL.jpg) ## Available Options This product comes in different **Size** options. ## Frequently Bought Together - OASE Indoor Aquatics HeatUp 300 Watt Aquarium Heater, Clear - OASE BioMaster External Filter for Aquariums Up to 160 Gallons, Multi-Stage Filtration, Easy Maintenance Prefilter, Quiet Canister Filter, German Engineering - Seachem Matrix, 4 L / 1 gal. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/162607429-oase-indoor-aquatics-heatup-300-watt-aquarium-heater-clear](https://www.desertcart.hr/products/162607429-oase-indoor-aquatics-heatup-300-watt-aquarium-heater-clear) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-11-02*