Oase Hel-X 13 is a highly advanced biological filter media as used in the Oase BioMaster External Aquarium Filter range. Oase Hel-x. Hel-X 13 Biomedia has been redeveloped by Oase engineers to further increase its biological settlement surface area. This increase is 13% more in comparison to the preceding Oase Hel-X Biomedia. Hence the fresh name Hel-X 13.

The Hel-X 13 comes in a super handy net bag for quick and easy maintenance.

The Hel-x 13 advanced biomedia structure is designed into helical geometry which consists of individual housing to allow beneficial aerobic bacteria to settle and breed inside to rapidly break down food and fish waste. The Hel-X 13 has High total settlement surface area of 955 m²/m³ and a total protected settlement surface of 806 m²/m³ which helps promote plenty of aerobic bacteria. This helps sustain a much healthier and clearer environment for your fish.

Key Features:

• 13% more surface area than the original Hel-X Biomedia
• Swiftly breaks down food and fish waste
• Helps to create healthier and clearer water
• Comes in a super handy net bag for easy maintenance
• 955m²/m³ Settlement surface area
• 806m²/m³ protected Settlement surface area

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.