The Fluval T300 Fully Electronic Heater provides accurate and stable temperature control for freshwater aquariums up to 300 litres (80 US gallons). Built with advanced electronic construction, this heater delivers consistent heating performance, helping maintain a stable aquatic environment for fish and plants.

Item Condition: Ex Demo | Tested | Working

A 24/7 monitoring system continuously regulates the water temperature, reducing the risk of sudden fluctuations that can stress aquatic livestock. The integrated 360° indicator light ring clearly displays the heater’s status from any angle, illuminating red while heating and blue once the selected temperature has been reached. This makes it easy to monitor the heater’s operation at a glance.

The large grip dial allows simple adjustment of the water temperature between 22°C and 32°C. The fully submersible design offers flexible placement within the aquarium and can be positioned either vertically or horizontally depending on the layout of the tank. For added safety, the heater automatically cuts power when removed from water, helping prevent overheating, while the protective heater guard offers additional protection against breakage.

Key Features:

• 300W electronic aquarium heater for freshwater aquariums up to 300 litres (80 US gallons)
• Advanced electronic construction for stable and accurate heating
• 24/7 monitoring helps regulate temperature and reduce fluctuations
• 360° indicator light ring shows heater status from any viewing angle
• Red light indicates heating, blue light indicates target temperature reached
• Large grip dial adjusts temperature between 22°C and 32°C
• Automatic power cut when heater is removed from water
• Protective heater guard helps reduce risk of breakage
• Fully submersible design for vertical or horizontal placement

The Fluval T300 heater offers reliable electronic temperature control for larger freshwater aquariums. Its clear status indicator, adjustable temperature dial, and built-in safety features make it a practical option for maintaining stable water conditions in home aquariums.

Specifications:

• Wattage: 300W
• Recommended Aquarium Size: Up to 300 Litres (80 US gallons)
• Temperature Range: 22°C – 32°C
• Power Supply: Mains powered
• Installation: Fully submersible (vertical or horizontal placement)
• Aquarium Type: Freshwater

Aquacadabra acts as credit broker/intermediary and not as a lender.

Klarna's credit products are provided by Klarna Bank AB, which is authorised and regulated by the Swedish Financial Services Authority, with limited supervision by the Financial Conduct Authority. More information can be found here.

Newpay finance options are provided through Deko’s platform by NewDay. P.D. Aquatics Ltd, t/a Aquacadabra is an Introducer Appointed Representative of Pay4Later Ltd, t/a Deko, which is authorised and regulated by the Financial Conduct Authority (ref no 728646) and is a credit broker, not a lender. NewDay Ltd is authorised and regulated by the Financial Conduct Authority (ref no 690292) and is authorised by the Financial Conduct Authority under the Payment Services Regulations 2017 for the provision of payment services (ref no 555318). More information can be found by clicking the newpay option above, or in the Newpay FAQs.

We really want you to be happy with the product that you've received. If however, when the goods arrive they're not what you want, then no problem - we have a 60 day no quibble return guarantee. Just let us know that you're going to return the item(s) by contacting us(stating your Order Number) and complete the returns packing slip that will have been included with your delivery. This will help us to quickly identify the item that you have returned (unopened and unused) - and we'll put a refund through for you.