The BioMaster² 850 Thermo external filter delivers high‑performance mechanical and biological filtration for larger aquariums up to 850 litres. Equipped with highly effective Hel‑X biological media and mechanical‑biological filter sponges, it promotes healthy, crystal‑clear water. The included HeatUp 400 adjustable heater ensures stable temperatures, making this a comprehensive all‑in‑one aquarium filtration and heating solution.

Designed with convenience in mind, the EasyClean pre‑filter chamber simplifies routine maintenance, while the practical priming button allows quick and straightforward start‑up. An automatic shut‑off system and safety valve help prevent unintended water leakage when servicing the pre‑filter module. This complete set includes all necessary filter media, hoses, adapters, intake and outlet pipes, plus a spray bar for improved water return flow. Note: the item shows signs of use, has no original box and includes only the spray bar (no other return attachments).

Key Features:

• Suitable for aquariums up to 850 litres
• Combined mechanical and biological filtration with Hel‑X and filter sponges
• EasyClean pre‑filter chamber for convenient maintenance
• Included HeatUp 400 adjustable heater for temperature control
• Priming button for easy start‑up
• Automatic shut‑off and safety valve to prevent leakage
• Complete set includes media, hoses, adapters, intake/outlet pipes, and spray bar

This BioMaster² 850 Thermo set provides powerful, dependable filtration and heating for large aquarium systems, combining ease of use with effective water quality management.

Specifications:

• Model: BioMaster² 850 Thermo external filter
• Suitable aquarium size: up to 850 L
• Includes: Filter unit, HeatUp 400 heater, media, hoses, adapters, intake/outlet pipes, spray bar
• Condition: Signs of use, no original box, only spray bar included

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.