Check the listing for details. Eheim 2509101 SUBSTRAT 2 litres. Filter media, Genuine Eheim media. Condition: New, Made in Germany. Listed at 47.97 USD. Eheim SUBSTRAT is Eheim's standard biological filter media. This is a highly porous filter material made from sintered glass and it has a large surface for bacteria to colonise (450 m² per litre). Suitable for use in most external canister and sump filters. pH neutral for fresh or marine water. Washable and reusable over and over again. We aim to dispatch all items, purchased and cleared payment received by 1.00pm, on day of purchase - ensuring lightning fast delivery. Please bear in mind it is dispatch time and not delivery time you are marking us on. We do our best to offer you a 5 star service if you feel for any reason you have not received this, then please contact us prior to leaving feedback so we can resolve the matter. BUY WITH CONFIDENCE - CHECK MY FEEDBACK, Be sure to add me.