EHEIM Substrat (formerly Ehfisubstrat) is a bio filter medium with high biological performance. EHEIM Substrat is a highly porous filter medium made from specially-designed sintered glass with an enormous surface area of 450 m² per liter, thus biologically filtering the water.

The surface structure of EHEIM Substrat offers excellent colonisation conditions to the important purification bacteria. When changing the filter material, mix about 1/3 of the used medium with new one to achieve rapid repopulation of bacteria.

EHEIM Substrat may be washed with lukewarm water and be used several times. Before use rinse thoroughly. To be used in fresh and marine water.

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.