300w Fish Tank Heater - Aquarium Heater with Led Digital Display, External Temperature Controller, Overheat Protection for 35 to 70 Gallon Tank - size: 300w for 35 to 70 gallon tank

About this item

• 【300w Aquarium Heater】 This 300W fish tank heater is designed for 35 to70 gallon tanks and comes with a 5.35 ft power cord for flexible placement. Its slim and strong suction cups allow easy, space-saving installation in betta bowls, nano tanks, and shallow turtle habitats.
• 【Enhanced Safety & Automatic Protection】 Built with waterproof, safety-insulated materials. The heater automatically shuts off if removed from water and features smart self-diagnosis—E1 indicates dry-run protection, E3 signals overheat protection. Auto-memory restores your settings after any power interruption.
• 【Accurate Digital Temperature Control】 Adjust the temperature precisely between 68 °F and 93 °F . A clear LED display shows the current temperature and any error codes. Use the external controller to adjust settings without wetting your hands, and enjoy consistent, reliable heating for a healthy aquarium environment.
• 【Energy-Efficient & Rapid Heating】 Optimally matched for 35 to 70 gallon aquariums, metal-ceramic element deliver fast, even heat while using less energy. After the initial 72 hour warm up, it maintains a stable temperature with minimal fluctuation.
• 【Durable, User-Friendly & Reliable】 Built with robust materials for long-term use and trusted performance. Simple to operate: hold the button for 3 seconds to switch between °C/°F. For best results, install vertically in fish tanks or horizontally in turtle tanks—do not bury in substrate.

Overview

• Product Dimensions ‏: ‎ 8.86 x 4.72 x 2.56 inches; 12.31 ounces
• Item model number ‏: ‎ BT-G300
• Date First Available ‏: ‎ August 20, 2025
• Manufacturer ‏: ‎ Boxtech
• ASIN ‏: ‎ B0FN3L6CBK
• Best Sellers Rank: #25,819 in Pet Supplies (See Top 100 in Pet Supplies) #37 in Aquarium Heaters
• Customer Reviews: 4.1 4.1 out of 5 stars (4)